DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the

indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds and loans, normally, are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events

which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's

investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events

which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's

investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board of Trustees.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events

which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's

investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the

indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performances.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim

provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these

reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and, semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities--Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities--If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities--Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities--The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options--Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds--To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities--Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities--If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the

indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities--Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities--The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options--Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds--To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.

DETERMINATION OF NET ASSET VALUE

The price of the fund's shares is the fund's net asset value per share. The fund values portfolio securities for which market quotations are readily available at market value. The fund values all other securities and assets for which market quotations are unavailable or unreliable at their fair value in good faith using procedures approved by the Board of the fund. The Board has delegated the daily determination of good faith fair value methodologies to Invesco Aim's Valuation Committee, which acts in accordance with Board approved policies. On a quarterly basis, Invesco Aim provides the Board various reports indicating the quality and effectiveness of its fair value decisions on portfolio holdings. Securities and other assets quoted in foreign currencies are valued in U.S. dollars based on the prevailing exchange rates on that day.

Even when market quotations are available, they may be stale or they may be unreliable because the security is not traded frequently, trading on the security ceased before the close of the trading market or issuer specific events occurred after the security ceased trading or because of the passage of time between the close of the market on which the security trades and the close of the NYSE and when the fund calculates its net asset value. Issuer specific events may cause the last market quotation to be unreliable. Such events may include a merger or insolvency, events which affect a geographical area or an industry segment, such as political events or natural disasters, or market events, such as a significant movement in the U.S. market. Where market quotations are not readily available, including where the advisor determines that the closing price of the security is unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board. Fair value pricing may reduce the ability of frequent traders to take advantage of arbitrage opportunities resulting from potentially "stale" prices of portfolio holdings. However, it cannot eliminate the possibility of frequent trading.

Fair value is that amount that the owner might reasonably expect to receive for the security upon its current sale. Fair value requires consideration of all appropriate factors, including indications of fair value available from pricing services. A fair value price is an estimated price and may vary from the prices used by other mutual funds to calculate their net asset values.

The advisor may use indications of fair value from pricing services approved by the Board. In other circumstances, the advisor valuation committee may fair value securities in good faith using procedures approved by the Board. As a means of evaluating its fair value process, the advisor routinely compares closing market prices, the next day's opening prices for the security in its primary market if available, and indications of fair value from other sources. Fair value pricing methods and pricing services can change from time to time as approved by the Board.

Specific types of securities are valued as follows:

Domestic Exchange Traded Equity Securities: Market quotations are generally available and reliable for domestic exchange traded equity securities. If market quotations are not available or are unreliable, the advisor will value the security at fair value in good faith using procedures approved by the Board.

Foreign Securities: If market quotations are available and reliable for foreign exchange traded equity securities, the securities will be valued at the market quotations. Because trading hours for certain foreign securities end before the close of the NYSE, closing market quotations may become unreliable. If between the time trading ends on a particular security and the close of the customary trading session on the NYSE events occur that are significant and may make the closing price unreliable, the fund may fair value the security. If an issuer specific event has occurred that the advisor determines, in its judgment, is likely to have affected the closing price of a foreign security, it will price the security at fair value. The advisor also relies on a screening process from a pricing vendor to indicate the degree of certainty, based on historical data, that the closing price in the principal market where a foreign security trades is not the current market value as of the close of the NYSE. For foreign securities where the advisor believes, at the approved degree of certainty, that the price is not reflective of current market value, the advisor will use the indication of fair value from the pricing service to determine the fair value of the security. The pricing vendor, pricing methodology or degree of certainty may change from time to time.

Fund securities primarily traded on foreign markets may trade on days that are not business days of the fund. Because the net asset value of fund shares is determined only on business days of the fund, the value of the portfolio securities of a fund that invests in foreign securities may change on days when you will not be able to purchase or redeem shares of the fund.

Fixed Income Securities: Government, corporate, asset-backed and municipal bonds and convertible securities, including high yield or junk bonds, and loans, normally are valued on the basis of prices provided by independent pricing services. Prices provided by the pricing services may be determined without exclusive reliance on quoted prices, and may reflect appropriate factors such as institution-size trading in similar groups of securities, developments related to special securities, dividend rate, maturity and other market data. Prices received from pricing services are fair value prices. In addition, if the price provided by the pricing service and independent quoted prices are unreliable, the advisor valuation committee will fair value the security using procedures approved by the Board.

Short-term Securities: The fund's short-term investments are valued at amortized cost when the security has 60 days or less to maturity.

Futures and Options: Futures contracts are valued at the final settlement price set by the exchange on which they are principally traded. Options are valued on the basis of market quotations, if available.

Swap Agreements: Swap Agreements are fair valued using an evaluated quote provided by an independent pricing service. Evaluated quotes provided by the pricing service are based on a model that may include end of day net present values, spreads, ratings, industry and company performance.

Open-end Funds: To the extent the fund invests in other open-end funds, other than open-end funds that are exchange traded, the investing fund will calculate its net asset value using the net asset value of the underlying fund in which it invests.

The fund discloses portfolio holdings at different times to insurance companies issuing variable products that invest in the fund, and in annual and semi-annual shareholder reports. Refer to such reports to determine the types of securities in which a fund has invested. You may also refer to the Statement of Additional Information to determine what types of securities in which the fund may invest. You may obtain copies of these reports or of the Statement of Additional Information from the insurance company that issued your variable product, or from the advisor as described on the back cover of this prospectus.

The fund determines the net asset value of its shares on each day the NYSE is open for business, as of the close of the customary trading session, or earlier NYSE closing time that day.

TAXES

Insurance company separate accounts may invest in the fund and, in turn, may offer variable products to investors through insurance contracts. Because the insurance company separate accounts are generally the shareholders in the fund, all of the tax characteristics of the fund's investments flow into the separate accounts and not to each variable product owner. The tax consequences from each variable product owner's investment in a variable product contract will depend upon the provisions of these contracts, and variable product owners should consult with their contract prospectus for more information on these tax consequences.