INVESTMENT OBJECTIVE, STRATEGIES AND RISKS

The following supplements the information contained in the Prospectus concerning the investment objective and strategies of the Fund.

The investment objective of the Fund may be changed without shareholder approval. Except as expressly noted below, the Fund’s investment strategies may be changed without shareholder approval. In addition to the instruments discussed below and in the Prospectus, the Fund may purchase other types of financial instruments,

2

Table of Contents

however designated, whose investment and credit quality characteristics are determined by NTI to be substantially similar to those of any other investment otherwise permitted by the Fund’s investment strategies. The Fund seeks to achieve its investment objective by investing, under normal circumstances, at least 80% of its net assets in U.S. dollar denominated investment-grade fixed-income securities either directly or indirectly through exchange-traded funds (“ETFs”) and other registered investment companies. The Fund primarily invests in fixed-rate securities of varying maturities, including bonds, debt securities and other similar instruments issued by U.S. public and U.S and non-U.S. private sector entities. Such issuers include, without limitation, U.S. governments and their agencies, instrumentalities or sponsored enterprises, and U.S. and non-U.S. private-sector entities, such as corporations and banks.

The Fund seeks to provide attractive risk-adjusted performance by investing in a portfolio of fixed-income securities that is designed to achieve optimal potential for total return after taking into account various sources of investment risk. The Fund adjusts its allocations to securities based on NTI’s assessment of potential changes in interest rate levels, the shape of the yield curve and credit spread relationships. The Fund also seeks to balance the potential for return and risk while emphasizing liquidity and diversification across a spectrum of U.S. dollar denominated investment-grade fixed income securities. The Fund may make the foregoing investments either directly or indirectly by investing in underlying indexed or actively managed ETFs or other registered investment companies (together with ETFs, “Underlying Funds”) that invest in such securities. The Underlying Funds in which the Fund may invest include funds managed by NTI or its affiliates. The Fund is an actively managed ETF and does not seek to replicate the performance of a specified index.

The following supplements the information contained in the Prospectus concerning the investment objective and policies of the Fund. Because the Fund may significantly invest in Underlying Funds, the risks of investment in particular types of securities, instruments and portfolio management techniques discussed below may be borne by the Fund through its investment in the Underlying Funds, in addition to the risks associated with those securities and instruments if the Fund invested in them directly or the portfolio management techniques that the Fund engages in directly.

ASSET-BACKED (INCLUDING MORTGAGE-BACKED) SECURITIES. The Fund may purchase asset-backed securities, which are securities backed by mortgages, installment contracts, credit card receivables or other financial assets. The Fund will invest no more than 10% of its total assets in non-agency asset-backed securities (including mortgage-backed securities). The investment characteristics of asset-backed securities differ from those of traditional fixed-income securities. Asset-backed securities represent interests in “pools” of assets in which payments of both interest and principal on the securities are made periodically, thus in effect “passing through” such payments made by the individual borrowers on the assets that underlie the securities, net of any fees paid to the issuer or guarantor of the securities. The average life of asset-backed securities varies with the maturities of the underlying instruments, and the average life of a mortgage-backed instrument, in particular, is likely to be substantially less than the original maturity of the mortgage pools underlying the securities as a result of mortgage prepayments. For this and other reasons, an asset-backed security normally is subject to both call risk and extension risk, and an asset-backed security’s stated maturity may be shortened. In addition, the security’s total return may be difficult to predict precisely. These differences can result in significantly greater price and yield volatility than is the case with traditional fixed-income securities.

If an asset-backed security is purchased at a premium, a prepayment rate that is faster than expected will reduce yield to maturity, while a prepayment rate that is slower than expected will have the opposite effect of increasing yield to maturity. Conversely, if an asset-backed security is purchased at a discount, faster than expected prepayments will increase, while slower than expected prepayments will decrease, yield to maturity. In calculating the Fund’s average weighted maturity, the maturity of asset-backed securities will be based on estimates of average life. Prepayments on asset-backed securities generally increase with falling interest rates and decrease with rising interest rates; furthermore, prepayment rates are influenced by a variety of economic and social factors. In general, the collateral supporting non-mortgage asset-backed securities is of shorter maturity than mortgage loans and is less likely to experience substantial prepayments.

3

Table of Contents

Asset-backed securities acquired by the Fund may include collateralized mortgage obligations (“CMOs”). CMOs provide the holder with a specified interest in the cash flow of a pool of underlying mortgages or other mortgage-backed securities. Issuers of CMOs ordinarily elect to be taxed as pass-through entities known as real estate mortgage investment conduits (“REMICs”). CMOs are issued in multiple classes, each with a specified fixed or floating interest rate and a final distribution date. The relative payment rights of the various CMO classes may be structured in a variety of ways, and normally are considered derivative securities. In some cases CMOs may be highly leveraged and very speculative.

There are a number of important differences among the agencies, instrumentalities and sponsored enterprises of the U.S. government that issue mortgage-related securities and among the securities that they issue. Mortgage-related securities guaranteed by the Government National Mortgage Association (“Ginnie Mae”) include Ginnie Mae Mortgage Pass-Through Certificates, which are guaranteed as to the timely payment of principal and interest by Ginnie Mae and backed by the full faith and credit of the United States, which means that the U.S. government guarantees that the interest and principal will be paid when due. Ginnie Mae is a wholly-owned U.S. government corporation within the Department of Housing and Urban Development. Ginnie Mae certificates also are supported by the authority of Ginnie Mae to borrow funds from the U.S. Treasury to make payments under its guarantee.

Mortgage-backed securities issued by the Federal National Mortgage Association (“Fannie Mae”) include Fannie Mae Guaranteed Mortgage Pass-Through Certificates, which are solely the obligations of Fannie Mae and are not backed by or entitled to the full faith and credit of the United States, except as described below, but are supported by the right of the issuer to borrow from the U.S. Treasury. Fannie Mae is a stockholder-owned corporation chartered under an Act of the U.S. Congress. Fannie Mae certificates are guaranteed as to timely payment of the principal and interest by Fannie Mae. Mortgage-related securities issued by the Federal Home Loan Mortgage Corporation (“Freddie Mac”) include Freddie Mac Mortgage Participation Certificates. Freddie Mac is a corporate instrumentality of the United States, created pursuant to an Act of Congress. Freddie Mac certificates are not guaranteed by the United States or by any Federal Home Loan Banks and do not constitute a debt or obligation of the United States or of any Federal Home Loan Bank. Freddie Mac certificates entitle the holder to timely payment of interest, which is guaranteed by Freddie Mac. Freddie Mac guarantees either ultimate collection or timely payment of all principal payments on the underlying mortgage loans. When Freddie Mac does not guarantee timely payment of principal, Freddie Mac may remit the amount due on account of its guarantee of ultimate payment of principal after default.

From time to time, proposals have been introduced before Congress for the purpose of restricting or eliminating federal sponsorship of Fannie Mae and Freddie Mac. The Trust cannot predict what legislation, if any, may be proposed in the future in Congress with regard to such sponsorship or which proposals, if any, might be enacted. Such proposals, if enacted, might materially and adversely affect the availability of government guaranteed mortgage-backed securities and the Fund’s liquidity and value.

There is risk that the U.S. government will not provide financial support to its agencies, authorities, instrumentalities or sponsored enterprises. The Fund may purchase U.S. government securities that are not backed by the full faith and credit of the United States, such as those issued by Fannie Mae and Freddie Mac. The maximum potential liability of the issuers of some U.S. government securities held by the Fund may greatly exceed their current resources, including their legal right to support from the U.S. Treasury. It is possible that these issuers will not have the funds to meet their payment obligations in the future.

The volatility and disruption that impacted the capital and credit markets during late 2008 and into 2009 have led to increased market concerns about Freddie Mac’s and Fannie Mae’s ability to withstand future credit losses associated with securities held in their investment portfolios, and on which they provide guarantees, without the direct support of the federal government. On September 7, 2008, both Freddie Mac and Fannie Mae were placed under the conservatorship of the Federal Housing Finance Agency (“FHFA”). Under the plan of conservatorship, the FHFA has assumed control of, and generally has the power to direct, the operations of

4

Table of Contents

Freddie Mac and Fannie Mae, and is empowered to exercise all powers collectively held by their respective shareholders, directors and officers, including the power to: (1) take over the assets of and operate Freddie Mac and Fannie Mae with all the powers of the shareholders, the directors, and the officers of Freddie Mac and Fannie Mae and conduct all business of Freddie Mac and Fannie Mae; (2) collect all obligations and money due to Freddie Mac and Fannie Mae; (3) perform all functions of Freddie Mac and Fannie Mae which are consistent with the conservator’s appointment; (4) preserve and conserve the assets and property of Freddie Mac and Fannie Mae; and (5) contract for assistance in fulfilling any function, activity, action or duty of the conservator. In addition, in connection with the actions taken by the FHFA, the U.S. Treasury Department (the “Treasury”) entered into certain preferred stock purchase agreements with each of Freddie Mac and Fannie Mae which established the Treasury as the holder of a new class of senior preferred stock in each of Freddie Mac and Fannie Mae, which stock was issued in connection with financial contributions from the Treasury to Freddie Mac and Fannie Mae.

The conditions attached to the financial contribution made by the Treasury to Freddie Mac and Fannie Mae and the issuance of this senior preferred stock placed significant restrictions on the activities of Freddie Mac and Fannie Mae. Freddie Mac and Fannie Mae must obtain the consent of the Treasury to, among other things: (i) make any payment to purchase or redeem its capital stock or pay any dividend other than in respect of the senior preferred stock issued to the Treasury, (ii) issue capital stock of any kind, (iii) terminate the conservatorship of the FHFA except in connection with a receivership, or (iv) increase its debt beyond certain specified levels. In addition, significant restrictions were placed on the maximum size of each of Freddie Mac’s and Fannie Mae’s respective portfolios of mortgages and mortgage-backed securities, and the purchase agreements entered into by Freddie Mac and Fannie Mae provide that the maximum size of their portfolios of these assets must decrease by a specified percentage each year. The future status and role of Freddie Mac and Fannie Mae could be impacted by (among other things) the actions taken and restrictions placed on Freddie Mac and Fannie Mae by the FHFA in its role as conservator; the restrictions placed on Freddie Mac’s and Fannie Mae’s operations and activities as a result of the senior preferred stock investment made by the Treasury; market responses to developments at Freddie Mac and Fannie Mae; and future legislative and regulatory action that alters the operations, ownership, structure and/or mission of these institutions, each of which may, in turn, impact the value of, and cash flows on, any mortgage-backed securities guaranteed by Freddie Mac and Fannie Mae, including any such mortgage-backed securities held by the Fund.

As a result of the economic recession that commenced in the U.S. in 2008, there is a heightened risk that the receivables and loans underlying the asset-backed securities purchased by the Fund may suffer greater levels of default than was historically experienced.

In addition, privately issued mortgage-backed securities (as well as other types of asset-backed securities) do not have the backing of any U.S. government agency, instrumentality or sponsored enterprise. The seller or servicer of the underlying mortgage obligations generally will make representations and warranties to certificate-holders as to certain characteristics of the mortgage loans and as to the accuracy of certain information furnished to the trustee in respect of each such mortgage loan. Upon a breach of any representation or warranty that materially and adversely affects the interests of the related certificate-holders in a mortgage loan, the seller or servicer generally will be obligated either to cure the breach in all material respects, to repurchase the mortgage loan or, if the related agreement so provides, to substitute in its place a mortgage loan pursuant to the conditions set forth therein. Such a repurchase or substitution obligation may constitute the sole remedy available to the related certificate-holders or the trustee for the material breach of any such representation or warranty by the seller or servicer. To provide additional investor protection, some mortgage-backed securities may have various types of credit enhancements, reserve funds, subordination provisions or other features. Non-mortgage asset-backed securities involve certain risks that are not presented by mortgage-backed securities. Primarily, these securities do not have the benefit of the same security interest in the underlying collateral. Credit card receivables generally are unsecured and the debtors are entitled to the protection of a number of state and federal consumer credit laws, many of which have given debtors the right to set off certain amounts owed on the credit cards, thereby reducing the balance due. Most issuers of automobile receivables permit the servicers to retain

5

Table of Contents

possession of the underlying obligations. If the servicer were to sell these obligations to another party, there is a risk that the purchaser would acquire an interest superior to that of the holders of the related automobile receivables. In addition, because of the large number of vehicles involved in a typical issuance and technical requirements under state laws, the trustee for the holders of the automobile receivables may not have an effective security interest in all of the obligations backing such receivables. Therefore, there is a possibility that recoveries on repossessed collateral may not, in some cases, be able to support payments on these securities.

To the extent consistent with its investment objective and strategies, the Fund may invest in a category of pass-through securities backed by pools of mortgages and issued by Fannie Mae, Freddie Mac, or Ginnie Mae. In the basic mortgage-backed pass-through structure, mortgages with similar issuer, term and coupon characteristics are collected and aggregated into a “pool” consisting of multiple mortgage loans. The pool is assigned a CUSIP number and undivided interests in the pool are traded and sold as pass-through securities.

An investment in a specific pool of pass-through securities requires an analysis of the specific prepayment risk of mortgages within the covered pool (since mortgagors typically have the option to prepay their loans). The level of prepayments on a pool of mortgage securities is difficult to predict and can impact the subsequent cash flows and value of the mortgage pool. In addition, when trading specific mortgage pools, precise execution, delivery and settlement arrangements must be negotiated for each transaction.

The Fund seeks to obtain exposure to U.S. agency mortgage-backed pass-through securities, in whole or in part, through the use of TBA Transactions. “TBA” refers to a commonly used mechanism for the forward settlement of U.S. agency mortgage-backed pass-through securities, and not to a separate type of mortgage-back security. Most transactions in fixed-rate mortgage-backed pass-through securities occur through the use of TBA Transactions. TBA Transactions generally are conducted in accordance with widely-accepted guidelines which establish commonly observed terms and conditions for execution, settlement and delivery. In a TBA Transaction, the buyer and seller decide on general trade parameters, such as agency, settlement date, par amount and price. The actual pools delivered generally are determined two days prior to settlement date. The Fund may use TBA transactions in several ways. For example, the Fund may regularly enter into TBA agreements and “roll over” such agreements prior to the settlement date stipulated in such agreements. This type of TBA transaction is sometimes known as a “TBA Roll.” In a TBA Roll, the Fund generally will sell the obligation to purchase the pools stipulated in the TBA Agreement prior to the stipulated settlement date and will enter into a new TBA agreement for future delivery of pools of mortgage-backed pass-through securities. In addition, the Fund may enter into TBA agreements and settle such transactions on the stipulated settlement date by accepting actual receipt or delivery of the pools of mortgage-backed securities stipulated in the TBA agreement. The Fund is not required to use TBA Transactions to gain exposure to mortgage pools, and may choose to purchase those interests in any manner believed by the Investment Adviser to be in the best interest of the Fund. The Fund’s use of TBA rolls may cause the Fund to experience higher portfolio turnover, higher transaction costs and to pay higher capital gain distributions to shareholders (which may be taxable) than other FlexShares Funds that not use TBA rolls.

The Fund intends to invest cash pending settlement of any TBA Transactions in money market instruments, repurchase agreements or other high-quality, liquid short-term instruments, which may include money market funds advised by the Investment Adviser. The Fund will assume its pro rata share of fees and expenses of any money market fund that it may invest in, in addition to the each Fund’s own fees and expenses. Although money market funds generally seek to preserve the value of their shares at $1.00 per share, it is possible that the Fund could lose money by investing in a money market fund. Investments in money market funds have traditionally not and currently are not federally insured.

Default by or bankruptcy of a counterparty to a TBA Transaction would expose the Fund to possible losses because of adverse market action, expenses or delays in connection with the purchase or sale of the pools of mortgage pass-through securities specified in the TBA Transaction. To minimize this risk, the Fund will enter into TBA Transactions only with established counterparties (such as major broker-dealers) and the Investment

6

Table of Contents

Adviser will monitor the creditworthiness of such counterparties. In addition, the Fund may accept assignments of TBA Transactions from Authorized Participants from time to time.

BANK CAPITAL SECURITIES. The Fund may invest in bank capital securities. Bank capital securities are issued by banks to help fulfill their regulatory capital requirements. There are two common types of bank capital: Tier I and Tier II. Bank capital is generally, but not always, of investment grade quality. Tier I securities often take the form of trust preferred securities. Tier II securities are commonly thought of as hybrids of debt and preferred stock, are often perpetual (with no maturity date), callable and, under certain conditions, allow for the issuer bank to withhold payment of interest until a later date.

BONDS. The Fund may invest in bonds. A bond is an interest-bearing security issued by a company, governmental unit or, in some cases, a non-U.S. public or private entity. The issuer of a bond has a contractual obligation to pay interest at a stated rate on specific dates and to repay principal (the bond’s face value) periodically or on a specified maturity date. An issuer may have the right to redeem or “call” a bond before maturity, in which case the investor may have to reinvest the proceeds at lower market rates. Most bonds bear interest income at a “coupon” rate that is fixed for the life of the bond. The value of a fixed rate bond usually rises when market interest rates fall, and falls when market interest rates rise. Accordingly, a fixed rate bond’s yield (income as a percent of the bond’s current value) may differ from its coupon rate as its value rises or falls. Other types of bonds bear income at an interest rate that is adjusted periodically. Because of their adjustable interest rates, the value of “floating-rate” or “variable-rate” bonds fluctuates much less in response to market interest rate movements than the value of fixed rate bonds. The Fund may treat some of these bonds as having a shorter maturity for purposes of calculating the weighted average maturity of its investment portfolio. Bonds may be senior or subordinated obligations. Senior obligations generally have the first claim on a corporation’s earnings and assets and, in the event of liquidation, are paid before subordinated obligations. Bonds may be unsecured (backed only by the issuer’s general creditworthiness) or secured (also backed by specified collateral).

CALCULATION OF PORTFOLIO TURNOVER RATE. The portfolio turnover rate for the Fund is calculated by dividing the lesser of purchases or sales of portfolio investments for the reporting period by the monthly average value of the portfolio investments owned during the reporting period. The calculation excludes all securities whose maturities or expiration dates at the time of acquisition are one year or less. Portfolio turnover may vary greatly from year to year as well as within a particular year, and may be affected by changes in the holdings of specific issuers, changes in country weightings, cash requirements for redemption of shares and by requirements which enable the Fund to receive favorable tax treatment.

The Fund is not restricted by policy with regard to portfolio turnover and will make changes in its investment portfolio from time to time as business and economic conditions as well as market prices may dictate.

COMMERCIAL PAPER, BANKERS’ ACCEPTANCES, CERTIFICATES OF DEPOSIT, TIME DEPOSITS AND BANK NOTES. The Fund may invest in commercial paper, bankers’ acceptances, certificates of deposit, time deposits and bank notes. Commercial paper represents short-term unsecured promissory notes issued in bearer form by banks or bank holding companies, corporations and finance companies. Certificates of deposit are negotiable certificates issued against funds deposited in a commercial bank for a definite period of time and earning a specified return. Bankers’ acceptances are negotiable drafts or bills of exchange, normally drawn by an importer or exporter to pay for specific merchandise, which are “accepted” by a bank, meaning, in effect, that the bank unconditionally agrees to pay the face value of the instrument on maturity. Fixed time deposits are bank obligations payable at a stated maturity date and bearing interest at a fixed rate. Fixed time deposits may be withdrawn on demand by the investor, but may be subject to early withdrawal penalties that vary depending upon market conditions and the remaining maturity of the obligation. There are no contractual restrictions on the right to transfer a beneficial interest in a fixed time deposit to a third party. Bank notes generally rank junior to deposit liabilities of banks and pari passu with other senior, unsecured obligations of the bank. Bank notes are classified as “other borrowings” on a bank’s balance sheet, while deposit notes and certificates of deposit are classified as deposits. Bank notes are not insured by the FDIC or any other insurer. Deposit notes are insured by the FDIC only to the extent of $250,000 per depositor per bank.

7

Table of Contents

The Fund may invest a portion of its assets in the obligations of foreign banks and foreign branches of domestic banks. Such obligations include Eurodollar Certificates of Deposit (“ECDs”), which are U.S. dollar-denominated certificates of deposit issued by offices of foreign and domestic banks located outside the United States; Eurodollar Time Deposits (“ETDs”), which are U.S. dollar-denominated deposits in a foreign branch of a U.S. bank or a foreign bank; Canadian Time Deposits (“CTDs”), which are essentially the same as ETDs except they are issued by Canadian offices of major Canadian banks; Schedule Bs, which are obligations issued by Canadian branches of foreign or domestic banks; Yankee Certificates of Deposit (“Yankee CDs”), which are U.S. dollar-denominated certificates of deposit issued by a U.S. branch of a foreign bank and held in the United States; and Yankee Bankers’ Acceptances (“Yankee BAs”), which are U.S. dollar denominated bankers’ acceptances issued by a U.S. branch of a foreign bank and held in the United States.

Commercial paper purchased by the Fund may include asset-backed commercial paper. Asset-backed commercial paper is issued by a special purpose entity that is organized to issue the commercial paper and to purchase trade receivables or other financial assets. The credit quality of asset-backed commercial paper depends primarily on the quality of these assets and the level of any additional credit support.

CUSTODIAL RECEIPTS FOR TREASURY SECURITIES. To the extent consistent with its investment objective and strategies, the Fund may acquire U.S. government obligations and their unmatured interest coupons that have been separated (“stripped”) by their holder, typically a custodian bank or investment brokerage firm. Having separated the interest coupons from the underlying principal of the U.S. government obligations, the holder will resell the stripped securities in custodial receipt programs with a number of different names, including “Treasury Income Growth Receipts” (“TIGRs”) and “Certificate of Accrual on Treasury Securities” (“CATS”). The stripped coupons are sold separately from the underlying principal, which usually is sold at a deep discount because the buyer receives only the right to receive a future fixed payment on the security and does not receive any rights to periodic interest (cash) payments. The underlying U.S. Treasury bonds and notes themselves are held in book-entry form at the Federal Reserve Bank or, in the case of bearer securities (i.e., unregistered securities which are ostensibly owned by the bearer or holder), in trust on behalf of the owners. Counsel to the underwriters of these certificates or other evidences of ownership of U.S. Treasury securities have stated that, in their opinion, purchasers of the stripped securities most likely will be deemed the beneficial holders of the underlying U.S. government obligations for federal tax purposes. The Trust is unaware of any binding legislative, judicial or administrative authority on this issue.

CYBER SECURITY ISSUES. With the increased use of the Internet and because information technology (“IT”) systems and digital data underlie most of the Fund’s operations, the Fund and the Adviser, the Administrator, the Transfer Agent, the Distributor, Authorized Participants, and the Fund’s other service providers and the vendors of each (collectively “Service Providers”) are exposed to the risk that their operations and data may be compromised as a result of internal and external cyber-failures, breaches or attacks (“Cyber Risk”). This could occur as a result of malicious or criminal cyber-attacks. Cyber-attacks include actions taken to: (i) steal or corrupt data maintained online or digitally, (ii) gain unauthorized access to or release confidential information, (iii) shut down the Fund or Service Provider website through denial-of-service attacks, or (iv) otherwise disrupt normal business operations. However, events arising from human error, faulty or inadequately implemented policies and procedures or other systems failures unrelated to any external cyber-threat may have effects similar to those caused by deliberate cyber-attacks.

Successful cyber-attacks or other cyber-failures or events affecting the Fund or its Service Providers may adversely impact the Fund or its shareholders or cause your investment in the Fund to lose value. For instance, they may impact the Fund’s ability to calculate its NAV, cause the release of confidential Fund information, impede trading, or cause reputational damage. They could also subject the Fund or its Service Providers to regulatory fines, penalties or financial losses, reimbursement or other compensation costs, and/or additional compliance costs. Insurance protection and contractual indemnification provisions may not be available or may be insufficient to cover these losses. The Fund or its Service Providers may also incur significant costs to manage and control Cyber Risk.

8

Table of Contents

Cyber Risks are also present for issuers of securities or other instruments in which the Fund invests, which could result in material adverse consequences for such issuers, and may cause the Fund’s investment in such issuers to lose value.

While the Investment Adviser, Service Providers or Authorized Participants may have established business continuity plans and risk management systems to prevent such cyber attacks, there are inherent limitations in such plans and systems, including the possibility that certain risks have not been identified or that cyber attacks may be highly sophisticated. The Fund and its shareholders could be negatively impacted as a result.

EXCHANGE-TRADED NOTES. The Fund may invest in exchange-traded notes (“ETNs”). ETNs are debt obligations of investment banks which are traded on exchanges and the returns of which are linked to the performance of market indexes. In addition to trading ETNs on exchanges, investors may redeem ETNs directly with the issuer on a weekly basis, typically in a minimum amount of 50,000 units, or hold the ETNs until maturity. ETNs may be riskier than ordinary debt securities and may have no principal protection. The Fund’s investment in an ETN may be influenced by many unpredictable factors, including highly volatile commodities prices, changes in supply and demand relationships, weather, agriculture, trade, changes in interest rates, and monetary and other governmental policies, action and inaction. Investing in ETNs is not equivalent to investing directly in index components or the relevant index itself. Because ETNs are debt securities, they possess credit risk; if the issuer has financial difficulties or goes bankrupt, the investor may not receive the return it was promised.

FIXED INCOME SECURITIES . The Fund seeks to achieve the investment objective by investing under normal circumstances at least 80% of its total assets in U.S. dollar denominated investment-grade fixed-income securities, including bonds, debt securities and other similar instruments issued by U.S. public and U.S and non-U.S. private sector entities. Fixed income securities, including corporate debt obligations, generally expose the Fund to the following types of risk: (1) interest rate risk (the potential for fluctuations in bond prices due to changing interest rates); (2) income risk (the potential for a decline in the Fund’s income due to falling market interest rates); (3) credit risk (the possibility that a bond issuer will fail to make timely payments of either interest or principal to the Fund); (4) prepayment risk or call risk (the likelihood that, during periods of falling interest rates, securities with high stated interest rates will be prepaid, or “called” prior to maturity, requiring the Fund to invest the proceeds at generally lower interest rates); and (5) extension risk (the likelihood that as interest rates increase, slower than expected principal payments may extend the average life of fixed income securities, which will have the effect of locking in a below-market interest rate, increasing the security’s duration and reducing the value of the security).

In periods of declining interest rates, the yield (income from a fixed income security held by the Fund over a stated period of time) of a fixed income security may tend to be higher than prevailing market rates, and in periods of rising interest rates, the yield of a fixed income security may tend to be lower than prevailing market rates. In addition, when interest rates are falling, the inflow of net new money to the Fund will likely be invested in portfolio instruments producing lower yields than the balance of the Fund’s portfolio, thereby reducing the yield of the Fund. In periods of rising interest rates, the opposite can be true. The NAV of the Fund can generally be expected to change as general levels of interest rates fluctuate. The value of fixed income securities in the Fund’s portfolio generally varies inversely with changes in interest rates. Prices of fixed income securities with longer effective maturities are more sensitive to interest rate changes than those with shorter effective maturities.

Corporate debt obligations generally offer less current yield than securities of lower quality, but lower-quality securities generally have less liquidity, greater credit and market risk, and as a result, more price volatility.

Conditions in the U.S. and many foreign economies have resulted, and may continue to result, in fixed income instruments experiencing unusual liquidity issues, increased price volatility and, in some cases, credit downgrades and increased likelihood of default. These events have reduced the willingness and ability of some

9

Table of Contents

lenders to extend credit, and have made it more difficult for borrowers to obtain financing on attractive terms, if at all. As a result, the values of many types of securities have been reduced. In addition, global economies and financial markets are becoming increasingly interconnected, which increases the possibilities that conditions in one country or region might adversely impact issuers in a different country or region. The severity or duration of adverse economic conditions may also be affected by policy changes made by governments or quasi-governmental organizations. In addition, political events within the U.S. and abroad, such as the U.S. government’s recent inability to agree on a long-term budget and deficit reduction plan, the federal government shutdown and threats to not increase the federal government’s debt limit, may affect investor and consumer confidence and may adversely impact financial markets and the broader economy, perhaps suddenly and to a significant degree. High public debt in the U.S. and other countries creates ongoing systemic and market risks and policymaking uncertainty.

FORWARD COMMITMENTS, WHEN-ISSUED SECURITIES AND DELAYED-DELIVERY TRANSACTIONS. The Fund may purchase securities on a when-issued basis or purchase or sell securities on a forward commitment (sometimes called delayed-delivery) basis. These transactions involve a commitment by the Fund to purchase or sell securities at a future date. The price of the underlying securities (usually expressed in terms of yield) and the date when the securities will be delivered and paid for (the settlement date) are fixed at the time the transaction is negotiated. When-issued purchases and forward commitment transactions normally are negotiated directly with the other party.

The Fund will purchase securities on a when-issued basis or purchase or sell securities on a forward commitment basis only with the intention of completing the transaction and actually purchasing or selling the securities. If deemed advisable as a matter of investment strategy, however, the Fund may dispose of or negotiate a commitment after entering into it. The Fund also may sell securities it has committed to purchase before those securities are delivered to the Fund on the settlement date. The Fund may realize a capital gain or loss in connection with these transactions.

When the Fund purchases securities on a when-issued, delayed-delivery or forward commitment basis, the Fund will segregate liquid assets having a value (determined daily) at least equal to the amount of the Fund’s purchase commitments until three days prior to the settlement date, or will otherwise cover its position. These procedures are designed to ensure that the Fund will maintain sufficient assets at all times to cover its obligations under when-issued purchases, forward commitments and delayed-delivery transactions. For purposes of determining the Fund’s average dollar-weighted maturity, the maturity of when-issued, delayed delivery or forward commitment securities will be calculated from the commitment date.

FUTURES CONTRACTS AND RELATED OPTIONS. When necessary to manage the Fund’s exposure to interest-rate risks, the Fund may take short or long positions in U.S. Treasury futures or transact in interest rate swaps. The Fund may also invest in other interest rate futures contracts, including, but not limited to, Eurodollar and Federal Funds futures. An interest rate futures contract is an exchange-traded contract for which the reference instrument is an interest-bearing, fixed-income security or an inter-bank deposit. Two examples of common interest rate futures contracts are U.S. Treasury futures contracts and Eurodollar futures contracts. The reference instrument for a U.S. Treasury futures contract is a U.S. Treasury security. The reference instrument for a Eurodollar futures contract is the London Interbank Offered Rate (commonly referred to as LIBOR); Eurodollar futures contracts enable the purchaser to obtain a fixed rate for the lending of funds over a stated period of time and the seller to obtain a fixed rate for a borrowing of funds over that same period.

The Fund may purchase and sell call and put options on futures contracts. These futures contracts and options will be used to facilitate trading or to reduce transaction costs and to manage interest rate risk. The Fund will only enter into futures contracts and options on futures contracts that are traded on a U.S. or foreign exchange as applicable. The Fund will not use futures or options for speculative purposes.

The Trust, on behalf of the Fund, has claimed an exclusion from the definition of the term “commodity pool operator” (“CPO”) under the Commodity Exchange Act, and, therefore, is not subject to registration or regulation

10

Table of Contents

as a commodity pool operator under that Act. The Investment Adviser is not subject to registration or regulations as a commodity pool operator with respect to the Fund under the Commodity Exchange Act. As a result, the Fund is limited in its ability to trade instruments subject to the Commodity Futures Trading Commission’s (“CFTC’s’) jurisdiction, including commodity futures (which include futures on broad-based securities indexes and interest rate futures), options on commodity futures, certain swaps or other investments (whether directly or indirectly through investments in other investment vehicles).

Under this exclusion, the Fund must satisfy one of the following two trading limitations whenever it enters into a new commodity trading position: (1) the aggregate initial margin and premiums required to establish the Fund’s positions in CFTC-regulated instruments may not exceed 5% of the liquidation value of the Fund’s portfolio (after accounting for unrealized profits and unrealized losses on any such investments); or (2) the aggregate net notional value of such instruments, determined at the time the most recent position was established, may not exceed 100% of the liquidation value of the Fund’s portfolio (after accounting for unrealized profits and unrealized losses on any such positions). The Fund would not be required to consider its exposure to such instruments if they were held for “bona fide hedging” purposes, as such term is defined in the rules of the CFTC. In addition to meeting one of the foregoing trading limitations, the Fund may not market itself as a commodity pool or otherwise as a vehicle for trading in the markets for CFTC-regulated instruments.

The Fund will engage in transactions in futures contracts and related options only to the extent such transactions are consistent with the requirement of the Internal Revenue Code of 1986, as amended (the “Code”) for maintaining its qualifications as regulated investment companies for federal income tax purposes.

Participation in foreign futures and foreign options transactions involves the execution and clearing of trades on or subject to the rules of a foreign board of trade. Neither the National Futures Association (the “NFA”) nor any domestic exchange regulates activities of any foreign boards of trade, including the execution, delivery and clearing of transactions, or has the power to compel enforcement of the rules of a foreign board of trade or any applicable foreign law. This is true even if the exchange is formally linked to a domestic market so that a position taken on the market may be liquidated by a transaction on another market. Moreover, such laws or regulations will vary depending on the foreign country in which the foreign futures or foreign options transaction occurs. For these reasons, persons who trade foreign futures or foreign options contracts may not be afforded certain of the protective measures provided by the Commodity Exchange Act, the CFTC regulations and the rules of the NFA and any domestic exchange, including the right to use reparations proceedings before the CFTC and arbitration proceedings provided them by the NFA or any domestic futures exchange. In particular, the Fund’s investments in foreign futures or foreign options transactions may not be provided the same protections in respect of transactions on United States futures exchanges. In addition, the price of any foreign futures or foreign options contract may be affected by any variance in the foreign exchange rate between the time an order is placed and the time it is liquidated, offset or exercised.

In connection with the Fund’s position in a futures contract or related option, the Fund will segregate liquid assets or will otherwise cover its position in accordance with applicable SEC requirements.

For a further description of futures contracts and related options, see Appendix B to this SAI.

HEDGING. The Fund may engage in hedging. Hedging is a strategy in which a derivative is used to offset the risks associated with other Fund holdings. Losses on the other investment may be substantially reduced by gains on a derivative that reacts in an opposite manner to market movements. While hedging can reduce losses, it can also reduce or eliminate gains or cause losses if the market moves in a manner different from that anticipated by the Fund or if the cost of the derivative outweighs the benefit of the hedge. Hedging also involves correlation risk, i.e., the risk that changes in the value of the derivative will not match those of the holdings being hedged as expected by the Fund, in which case any losses on the holdings being hedged may not be reduced or may be increased. The inability to close options and futures positions also could have an adverse impact on the Fund’s ability to hedge effectively its portfolio. There is also a risk of loss by the Fund of margin deposits or collateral in

11

Table of Contents

the event of bankruptcy of a broker with whom the Fund has an open position in an option, a futures contract or a related option.

ILLIQUID OR RESTRICTED SECURITIES. Illiquid securities generally are any securities that cannot be disposed of promptly and in the ordinary course of business within seven days at approximately the amount at which the Fund has valued the securities. The Fund may purchase commercial paper issued pursuant to Section 4(2) of the Securities Act and securities that are not registered under the Securities Act but can be sold to “qualified institutional buyers” in accordance with Rule 144A under the Securities Act (“Rule 144A Securities”). These securities will be considered illiquid. In addition, the aggregate value of all of the Fund’s illiquid securities, Rule 144A Securities, variable amount master demand notes, fixed and variable rate loan participations and assignments, “inverse floaters”, and long-term variable and floating rate bonds where the Fund obtains at the time of purchase the right to put the bond back to the issuer or a third party at par at a specified date will not exceed 15% of the Fund’s total assets.

INDEBTEDNESS, LOAN PARTICIPATIONS AND ASSIGNMENTS. The Fund may purchase indebtedness and participations in commercial loans. Such investments may be secured or unsecured. Indebtedness is different from traditional debt securities in that debt securities are part of a large issue of securities to the public and indebtedness may not be a security, but may represent a specific commercial loan to a borrower. Loan participations typically represent direct participation, together with other parties, in a loan to a corporate borrower, and generally are offered by banks or other financial institutions or lending syndicates. The Fund may participate in such syndications, or can buy part of a loan, becoming a part lender. When purchasing indebtedness and loan participations, the Fund assumes the credit risk associated with the corporate borrower and may assume the credit risk associated with an interposed bank or other financial intermediary. The indebtedness and loan participations in which the Fund intends to invest may not be rated by any nationally recognized rating service.

The Fund may invest in debtor-in-possession financings (commonly known as “DIP financings”). DIP financings are arranged when an entity seeks the protections of the bankruptcy court under Chapter 11 of the U.S. Bankruptcy Code. These financings allow the entity to continue its business operations while reorganizing under Chapter 11. Such financings constitute senior liens on unencumbered security ( i.e. , security not subject to other creditors’ claims). There is a risk that the entity will not emerge from Chapter 11 and be forced to liquidate its assets under Chapter 7 of the U.S. Bankruptcy Code. In the event of liquidation, the Fund’s only recourse will be against the property securing the DIP financing. A loan is often administered by an agent bank acting as agent for all holders. The agent bank administers the terms of the loan, as specified in the loan agreement. In addition, the agent bank is normally responsible for the collection of principal and interest payments from the corporate borrower and the apportionment of these payments to the credit of all institutions which are parties to the loan agreement. Unless, under the terms of the loan or other indebtedness, the Fund has direct recourse against the corporate borrower, the Fund may have to rely on the agent bank or other financial intermediary to apply appropriate credit remedies against a corporate borrower.

A financial institution’s employment as agent bank might be terminated in the event that it fails to observe a requisite standard of care or becomes insolvent. A successor agent bank would generally be appointed to replace the terminated agent bank, and assets held by the agent bank under the loan agreement should remain available to holders of such indebtedness. However, if assets held by the agent bank for the benefit of the Fund were determined to be subject to the claims of the agent bank’s general creditors, the Fund might incur certain costs and delays in realizing payment on a loan or loan participation and could suffer a loss of principal and/or interest. In situations involving other interposed financial institutions ( e.g. , an insurance company or governmental agency) similar risks may arise.

Purchasers of loans and other forms of direct indebtedness depend primarily upon the creditworthiness of the corporate borrower for payment of principal and interest. If the Fund does not receive scheduled interest or principal payments on such indebtedness, the Fund’s share price and yield could be adversely affected. Loans

12

Table of Contents

that are fully secured offer the Fund more protection than an unsecured loan in the event of non-payment of scheduled interest or principal. However, there is no assurance that the liquidation of collateral from a secured loan would satisfy the corporate borrower’s obligation, or that the collateral can be liquidated.

The Fund may invest in loan participations with credit quality comparable to that of issuers of its securities investments. Indebtedness of companies whose creditworthiness is poor involves substantially greater risks, and may be highly speculative. Some companies may never pay off their indebtedness, or may pay only a small fraction of the amount owed. Consequently, when investing in indebtedness of companies with poor credit, the Fund bears a substantial risk of losing the entire amount invested.

Loans and other types of direct indebtedness may not be readily marketable and may be subject to restrictions on resale. In some cases, negotiations involved in disposing of indebtedness may require weeks to complete. Consequently, some indebtedness may be difficult or impossible to dispose of readily at what NTI believes to be a fair price. In addition, valuation of illiquid indebtedness involves a greater degree of judgment in determining the Fund’s net asset value than if that value were based on available market quotations, and could result in significant variations in the Fund’s daily share price. At the same time, some loan interests are traded among certain financial institutions and accordingly may be deemed liquid. As the market for different types of indebtedness develops, the liquidity of these instruments is expected to improve. In addition, the Fund currently intends to treat indebtedness for which there is no readily available market as illiquid for purposes of the Fund’s limitation on illiquid investments. Investments in loan participations are considered to be debt obligations for purposes of the Fund’s investment restriction relating to the lending of funds or assets by the Fund.

Investments in loans through a direct assignment of the financial institution’s interests with respect to the loan may involve additional risks to the Fund. For example, if a loan is foreclosed, the Fund could become part owner of any collateral, and would bear the costs and liabilities associated with owning and disposing of the collateral. In addition, it is conceivable that under emerging legal theories of lender liability, the Fund could be held liable as co-lender. It is unclear whether loans and other forms of direct indebtedness offer securities law protections against fraud and misrepresentation. In the absence of definitive regulatory guidance, the Fund relies on NTI’s research in an attempt to avoid situations where fraud or misrepresentation could adversely affect the Fund.

INFLATION-INDEXED SECURITIES. The Fund may invest in U.S. Treasury Inflation-Protected Securities (“TIPS”). Inflation-indexed securities issued by the U.S. Treasury have varying maturities and pay interest on a semiannual basis equal to a fixed percentage of the inflation-adjusted principal amount. If the periodic adjustment rate measuring inflation falls, the principal value of inflation-indexed bonds will be adjusted downward, and consequently the interest payable on these securities (calculated with respect to a smaller principal amount) will be reduced. Repayment of the original bond principal upon maturity (as adjusted for inflation) is guaranteed in the case of U.S. Treasury inflation-indexed bonds, even during a period of deflation. However, the current market value of the bonds is not guaranteed and will fluctuate. The Fund also may invest in other inflation-related bonds which may or may not provide a similar guarantee. If a guarantee of principal is not provided, the adjusted principal value of the bond repaid at maturity may be less than the original principal amount.

The value of inflation-indexed bonds is expected to change in response to changes in real interest rates. Real interest rates in turn are tied to the relationship between nominal interest rates and the rate of inflation. Therefore, if the rate of inflation rises at a faster rate than nominal interest rates, real interest rates might decline, leading to an increase in value of inflation-indexed bonds. In contrast, if nominal interest rates increase at a faster rate than inflation, real interest rates might rise, leading to a decrease in value of inflation-indexed bonds. Any increase in the principal amount of an inflation-indexed bond will be considered taxable ordinary income, even though investors do not receive their principal until maturity.

While these securities are expected to be protected from long-term inflationary trends, short-term increases in inflation may lead to a decline in value. If interest rates rise due to reasons other than inflation, investors in

13

Table of Contents

these securities may not be protected to the extent that the increase is not reflected in the bond’s inflation measure.

The periodic adjustment of U.S. inflation-indexed bonds is tied to the Consumer Price Index for Urban Consumers (“CPI-U”), which is calculated monthly by the U.S. Bureau of Labor Statistics. The CPI-U is a measurement of changes in the cost of living, made up of components such as housing, food, transportation and energy. There can be no assurance that the CPI-U will accurately measure the real rate of inflation in the prices of goods and services.

The taxation of inflation-indexed Treasury securities is similar to the taxation of conventional bonds. Both interest payments and the difference between original principal and the inflation-adjusted principal will be treated as interest income subject to taxation. Interest payments are taxable when received or accrued. The inflation adjustment to the principal is subject to tax in the year the adjustment is made, not at maturity of the security when the cash from the repayment of principal is received. If an upward adjustment has been made (which typically should happen), investors in non-tax-deferred accounts will pay taxes on this amount currently. Decreases in the indexed principal can be deducted only from current or previous interest payments reported as income. Inflation-indexed Treasury securities therefore have a potential cash flow mismatch to an investor, because investors must pay taxes on the inflation-adjusted principal before the repayment of principal is received. It is possible that, particularly for high income tax bracket investors, inflation-indexed Treasury securities would not generate enough income in a given year to cover the tax liability they could create. This is similar to the current tax treatment for zero-coupon bonds and other discount securities. If inflation-indexed Treasury securities are sold prior to maturity, capital losses or gains are realized in the same manner as traditional bonds. The Fund, however, distributes income on a monthly basis. Investors in the Fund will receive dividends that represent both the interest payments and the principal adjustments of the inflation-indexed securities held in the Fund.

INVESTMENT COMPANIES. The Fund may invest in the securities of Underlying Funds to the extent permitted by law, regulation, exemptive order or SEC staff guidance. Under the 1940 Act, the Fund’s investment in investment companies will be limited, subject to certain exceptions, so that, as determined after a purchase is made, either: (a) not more than 3% of the total outstanding stock of such investment company will be owned by the Fund, the Trust as a whole and its affiliated persons (as defined in the 1940 Act); or (b) (i) not more than 5% of the value of the total assets of the Fund will be invested in the securities of any one investment company, (ii) not more than 10% of the value of the total assets of the Fund will be invested in the aggregate in securities of investment companies as a group, and (iii) not more than 3% of the outstanding voting stock of any one investment company will be owned by the Fund. To the extent allowed by law or regulation, the Fund intends from time to time to invest its assets in Underlying Funds, in excess of the limits discussed above. Pursuant to an exemptive order, the limits will not apply to the investment of securities lending collateral by the Fund in certain investment portfolios advised by NTI. In addition, these limits will not apply to the investment of uninvested cash balances in shares of registered or unregistered money market funds whether affiliated or unaffiliated. The foregoing exemption, however, only applies to an unregistered money market fund that (i) limits its investments to those in which a money market fund may invest under Rule 2a-7 of the 1940 Act, and (ii) undertakes to comply with all the other provisions of Rule 2a-7.

Investments by the Fund in other investment companies, including ETFs, will be subject to the limitations of the 1940 Act except as permitted by SEC exemptive orders. The Fund may rely on SEC orders that permit them to invest in certain ETFs beyond the limits contained in the 1940 Act, subject to certain terms and conditions. Generally, these terms and conditions require the Board to approve policies and procedures relating to certain of the Fund’s investments in ETFs. These policies and procedures require, among other things, that (i) the Investment Adviser conducts the Fund’s investment in ETFs without regard to any consideration received by the Fund or any of its affiliated persons and (ii) the Investment Adviser certifies to the Board quarterly that it has not received any consideration in connection with an investment by the Fund in an ETF, or if it has, the amount and purpose of the consideration will be reported to the Board and an equivalent amount of advisory fees shall be waived by the Investment Adviser.

14

Table of Contents

NTI has contractually agreed to waive Management Fees or reimburse certain expenses in an amount equal to the sum of (a) any acquired fund fees and expenses, if any, incurred by the Fund that are attributable to the Fund’s investment in acquired funds managed by NTI or an investment adviser controlling, controlled by, or under common control with NTI (“Affiliated Funds”); and (b) 0.05% or such lesser amount in acquired fund fees and expenses incurred by the Fund that are attributable to the Fund’s investment in acquired funds that are not Affiliated Funds, until November 14, 2017. The Fund’s Board of Trustees may terminate the contractual arrangements at any time if it determines that it is in the best interest of the Fund and its shareholders.

Certain investment companies whose securities are purchased by the Fund may not be obligated to redeem such securities in an amount exceeding 1% of the investment company’s total outstanding securities during any period of less than 30 days. Therefore, such securities that exceed this amount may be illiquid.

If required by the 1940 Act and/or SEC exemptive orders, the Fund expects to vote the shares of other investment companies that are held by it in the same proportion as the vote of all other holders of such securities.

The Fund may adhere to other limitations with respect to its investments in securities issued by other investment companies if required or permitted by the SEC or deemed to be in the best interests of the Trust.

INVESTMENTS IN ETFs. Shares of ETFs are listed for trading on national securities exchanges and trade throughout the day on those exchanges and other secondary markets. There can be no assurance that the requirements of the national securities exchanges necessary to maintain the listing of shares of the ETFs will continue to be met. A national securities exchange may, but is not required to, remove the shares of the ETFs from listing if (1) following the initial twelve-month period beginning upon the commencement of trading of an ETF, there are fewer than fifty (50) record and/or beneficial holders of such ETF for thirty (30) or more consecutive trading days; (2) the value of the underlying index on which an ETF is based is no longer calculated or available; (3) the IOPV of an ETF is no longer calculated or available; or (4) any other event shall occur or condition exist that, in the opinion of the Listing Exchange, makes further dealings on the Listing Exchange inadvisable. A national securities exchange will remove the shares of an ETF from listing and trading upon termination of the ETF. Shares of each ETF trade on exchanges at prices at, above or below their most recent NAV. The per share NAV of each ETF is calculated at the end of each business day and fluctuates with changes in the market value of such ETF’s holdings since the most recent calculation. The trading prices of an ETF’s shares fluctuate continuously throughout trading hours based on market supply and demand rather than NAV. The trading prices of an ETF’s shares may deviate significantly from its NAV during periods of market volatility. Any of these factors may lead to an ETF’s shares trading at a premium or discount to NAV. Exchange prices are not expected to correlate exactly with an ETF’s NAV due to timing reasons as well as market supply and demand factors. In addition, disruptions to an ETF’s creations and redemptions or the existence of extreme market volatility may result in trading prices of ETF shares that differ significantly from NAV. If the Fund purchases shares of ETFs at a time when the market price of an ETF’s shares are at a premium to the NAV or sells at a time when the market price of an ETF is at a discount to the NAV, then the Fund may sustain losses.

MISCELLANEOUS. Securities may be purchased on margin only to obtain such short-term credits as necessary for the clearance of purchase and sales of securities.

MORTGAGE DOLLAR ROLLS. The Fund may enter into mortgage “dollar rolls” in which the Fund sells securities for delivery in the current month and simultaneously contracts with the same counterparty to repurchase similar (same type, coupon and maturity), but not identical, securities on a specified future date. The Fund gives up the right to receive principal and interest paid on the securities sold. However, the Fund would benefit to the extent of any difference between the price received for the securities sold and the lower forward price for the future purchase (often referred to as the “drop”) or fee income plus the interest earned on the cash proceeds of the securities sold until the settlement date of the forward purchase. Unless such benefits exceed the income, capital appreciation, and gain or loss due to mortgage prepayments that would have been realized on the securities sold as part of the mortgage dollar roll, the use of this technique will diminish the investment

15

Table of Contents

performance of the Fund. The Fund will hold and maintain in a segregated account until the settlement date cash or liquid assets in an amount equal to the forward purchase price. The benefits derived from the use of mortgage dollar rolls may depend upon the Investment Adviser’s ability to correctly predict mortgage prepayments and interest rates. There is no assurance that mortgage dollar rolls can be successfully employed.

For financial reporting and tax purposes, the Fund proposes to treat mortgage dollar rolls as two separate transactions; one transaction involving the purchase of a security and a separate transaction involving a sale. The Fund currently does not intend to enter into mortgage dollar rolls that are accounted for as a financing.

Mortgage dollar rolls involve certain risks, including the following: if the broker-dealer to whom the Fund sells the security becomes insolvent, the Fund’s right to purchase or repurchase the mortgage-related securities subject to the mortgage dollar roll may be restricted. Also, the instrument that the Fund is required to repurchase may be worth less than an instrument which the Fund originally held. Successful use of mortgage dollar rolls will depend upon the Investment Adviser’s ability to manage the Fund’s interest rate and mortgage prepayments exposure. For these reasons, there is no assurance that mortgage dollar rolls can be successfully employed. The use of this technique may diminish the investment performance of the Fund compared with what such performance would have been without the use of mortgage dollar rolls.

OPERATIONAL RISK . The Investment Adviser and other Fund service providers may experience disruptions or operating errors that could negatively impact the Fund. While service providers are required to have appropriate operational risk management policies and procedures, their methods of operational risk management may differ from the Fund’s in the setting of priorities, the personnel and resources available or the effectiveness of relevant controls. The Investment Adviser, through its monitoring and oversight of service providers, seeks to ensure that service providers take appropriate precautions to avoid and mitigate risks that could lead to disruptions and operating errors. However, it is not possible for the Investment Adviser or the other Fund service providers to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects.

OPTIONS . The Fund may buy put options, buy call options and write covered call and secured put options if NTI believes that it will help the Fund achieve its investment objective. These options may relate to particular securities, foreign and domestic stock indexes, financial instruments, or the yield differential between two securities (“yield curve options”) and may or may not be listed on a domestic or foreign securities exchange or issued by the Options Clearing Corporation. A call option for a particular security gives the purchaser of the option the right to buy, and a writer the obligation to sell, the underlying security at the stated exercise price prior to the expiration of the option, regardless of the market price of the security. The premium paid to the writer is in consideration for undertaking the obligation under the option contract. A put option for a particular security gives the purchaser the right to sell the security at the stated exercise price to the expiration date of the option, regardless of the market price of the security. In contrast to an option on a particular security, an option on an index provides the holder with the right to make or receive a cash settlement upon exercise of the option. The amount of this settlement will be equal to the difference between the closing price of the index at the time of exercise and the exercise price of the option expressed in dollars, times a specified multiple.

Options trading is a highly specialized activity, which entails greater than ordinary investment risk. Options on particular securities may be more volatile than the underlying instruments and, therefore, on a percentage basis, an investment in options may be subject to greater fluctuation than an investment in the underlying instruments themselves.

The Fund will write call options only if they are “covered.” In the case of a call option on a security, the option is “covered” if the Fund owns the security underlying the call or has an absolute and immediate right to acquire that security without additional cash consideration (or, if additional cash consideration is required, liquid assets in such amount are segregated) upon conversion or exchange of other securities held by it. For a call option on an index, the option is covered if the Fund maintains with its custodian a portfolio of securities

16

Table of Contents

substantially replicating the index, or liquid assets equal to the contract value. A call option also is covered if the Fund holds a call on the same security or index as the call written where the exercise price of the call held is: (i) equal to or less than the exercise price of the call written; or (ii) greater than the exercise price of the call written provided the Fund segregates liquid assets in the amount of the difference.

All put options written by the Fund would be covered, which means that the Fund will segregate cash or liquid assets with a value at least equal to the exercise price of the put option or will use the other methods described in the next sentence. A put option also is covered if the Fund holds a put option on the same security as the option written where the exercise price of the option held is: (i) equal to or higher than the exercise price of the option written; or (ii) less than the exercise price of the option written provided the Fund segregates liquid assets in the amount of the difference.

With respect to yield curve options, a call (or put) option is covered if the Fund holds another call (or put) option on the spread between the same two securities and segregates liquid assets sufficient to cover the Fund’s net liability under the two options. Therefore, the Fund’s liability for such a covered option generally is limited to the difference between the amount of the Fund’s liability under the option written by the Fund less the value of the option held by the Fund. Yield curve options also may be covered in such other manner as may be in accordance with the requirements of the counterparty with which the option is traded and applicable laws and regulations.

The Fund’s obligation to sell subject to a covered call option written by it, or to purchase a security subject to a secured put option written by it, may be terminated prior to the expiration date of the option by the Fund’s execution of a closing purchase transaction, which is effected by purchasing on an exchange an option of the same series (i.e., same underlying security, exercise price and expiration date) as the option previously written. Such a purchase does not result in the ownership of an option. A closing purchase transaction will ordinarily be effected to realize a profit on an outstanding option, to prevent an underlying instrument from being called, to permit the sale of the underlying security or to permit the writing of a new option containing different terms on such underlying security. The cost of such a liquidation purchase plus transaction costs may be greater than the premium received upon the original option, in which event the Fund will have incurred a loss in the transaction. There is no assurance that a liquid secondary market will exist for any particular option. An option writer, unable to effect a closing purchase transaction, will not be able to sell the underlying security (in the case of a covered call option) or liquidate the segregated assets (in the case of a secured put option) until the option expires or the optioned security is delivered upon exercise with the result that the writer in such circumstances will be subject to the risk of market decline or appreciation in the instrument during such period.

When the Fund purchases an option, the premium paid by it is recorded as an asset of the Fund. When the Fund writes an option, an amount equal to the net premium (the premium less the commission) received by the Fund is included in the liability section of the Fund’s statement of assets and liabilities as a deferred credit. The amount of this asset or deferred credit will be subsequently marked-to-market to reflect the current value of the option purchased or written. The current value of the traded option is the last sale price or, in the absence of a sale, the current bid price. If an option purchased by the Fund expires unexercised, the Fund realizes a loss equal to the premium paid. If the Fund enters into a closing sale transaction on an option purchased by it, the Fund will realize a gain if the premium received by the Fund on the closing transaction is more than the premium paid to purchase the option, or a loss if it is less. If an option written by the Fund expires on the stipulated expiration date or if the Fund enters into a closing purchase transaction, it will realize a gain (or loss if the cost of a closing purchase transaction exceeds the net premium received when the option is sold) and the deferred credit related to such option will be eliminated. If an option written by the Fund is exercised, the proceeds of the sale will be increased by the net premium originally received and the Fund will realize a gain or loss.

There are several risks associated with transactions in certain options. For example, there are significant differences between the securities and options markets that could result in an imperfect correlation between these markets, causing a given transaction not to achieve its objectives. In addition, a liquid secondary market for

17

Table of Contents

particular options, whether traded over-the-counter or on an exchange, may be absent for reasons which include the following: there may be insufficient trading interest in certain options; restrictions may be imposed by an exchange on opening transactions or closing transactions or both; trading halts, suspensions or other restrictions may be imposed with respect to particular classes or series of options or underlying securities or currencies; unusual or unforeseen circumstances may interrupt normal operations on an exchange; the facilities of an exchange or the Options Clearing Corporation may not at all times be adequate to handle current trading value; or one or more exchanges could, for economic or other reasons, decide or be compelled at some future date to discontinue the trading of options (or a particular class or series of options), in which event the secondary market on that exchange (or in that class or series of options) would cease to exist, although outstanding options that had been issued by the Options Clearing Corporation as a result of trades on that exchange would continue to be exercisable in accordance with their terms.

REPURCHASE AGREEMENTS. To the extent consistent with its investment policies, the Fund may agree to purchase portfolio securities from financial institutions subject to the seller’s agreement to repurchase them at a mutually agreed upon date and price (“repurchase agreements”). Repurchase agreements are considered to be loans under the 1940 Act. Although the securities subject to a repurchase agreement may bear maturities exceeding one year, settlement for the repurchase agreement will never be more than one year after the Fund’s acquisition of the securities and normally will be within a shorter period of time. Securities subject to repurchase agreements normally are held either by the Trust’s custodian or sub-custodian (if any), or in the Federal Reserve/Treasury Book-Entry System. The seller under a repurchase agreement will be required to maintain the value of the securities subject to the agreement in an amount exceeding the repurchase price (including accrued interest). Default by the seller would, however, expose the Fund to possible loss because of adverse market action or delay in connection with the disposition of the underlying obligations. In addition, in the event of a bankruptcy, the Fund could suffer additional losses if a court determines that the Fund’s interest in the collateral is unenforceable. If the Fund enters into a repurchase agreement with a foreign financial institution, it may also be subject to risks associated with foreign investments.

REVERSE REPURCHASE AGREEMENTS. To the extent consistent with its investment policies, the Fund may borrow funds by selling portfolio securities to financial institutions such as banks and broker/dealers and agreeing to repurchase them at a mutually specified date and price (“reverse repurchase agreements”). The Fund may use the proceeds of reverse repurchase agreements to purchase other securities either maturing, or under an agreement to resell, on a date simultaneous with or prior to the expiration of the reverse repurchase agreement. Reverse repurchase agreements are considered to be borrowings under the 1940 Act. Reverse repurchase agreements involve the risk that the market value of the securities sold by the Fund may decline below the repurchase price. The Fund will pay interest on amounts obtained pursuant to a reverse repurchase agreement. While reverse repurchase agreements are outstanding, the Fund will segregate liquid assets in an amount at least equal to the market value of the securities, plus accrued interest, subject to the agreement.

RISKS RELATED TO MEDIUM AND LOWER QUALITY SECURITIES. To the extent consistent with its investment objective and strategies, the Fund may invest in or hold medium and lower quality securities. Fixed-income securities rated Baa3 or BBB- are considered medium quality obligations with speculative characteristics. Fixed-income securities rated below Baa3 or BBB- are considered lower quality and are regarded as having significant speculative characteristics. Investment grade bonds are rated at least Baa3 by Moody’s Investor Service, Inc. (“Moody’s”) or BBB- by S&P Global Ratings (“S&P”) , the equivalent by another NRSRO or, if unrated, of equal quality in the opinion of the Investment Adviser. Investments in medium and lower quality securities present special risk considerations. Medium quality securities, although considered investment grade, also are considered to have speculative characteristics. Lower quality securities are considered predominantly speculative by traditional investment standards. In some cases, these lower quality obligations may be highly speculative and have poor prospects for reaching investment grade standard. While any investment carries some risk, certain risks associated with lower quality securities are different than those for investment-grade securities. The risk of loss through default is greater because lower quality securities usually are unsecured and are often subordinate to an issuer’s other obligations. Additionally, the issuers of these

18

Table of Contents

securities frequently have high debt levels and are thus more sensitive to difficult economic conditions, individual corporate developments and rising interest rates. Consequently, the market price of these securities may be quite volatile and may result in wider fluctuations of the Fund’s NAV per share.

There remains some uncertainty about the performance level of the market for lower quality securities under adverse market and economic environments. An economic downturn or increase in interest rates could have a negative impact on both the market for lower quality securities (resulting in a greater number of bond defaults) and the value of lower quality securities held in the portfolio of investments.

The economy and interest rates can affect lower quality securities differently than other securities. For example, the prices of lower quality securities are more sensitive to adverse economic changes or individual corporate developments than are the prices of higher quality investments. In addition, during an economic downturn or period in which interest rates are rising significantly, highly leveraged issuers may experience financial difficulties, which, in turn, would adversely affect their ability to service their principal and interest payment obligations, meet projected business goals and obtain additional financing.

The market value of lower quality securities tends to reflect individual corporate developments to a greater extent than that of higher quality securities, which react primarily to fluctuations in the general level of interest rates. Lower quality securities are often issued in connection with a corporate reorganization or restructuring or as a part of a merger, acquisition, takeover or similar event. They also are issued by less established companies seeking to expand. Such issuers are often highly leveraged, may not have available to them more traditional methods of financing and generally are less able than more established or less leveraged entities to make scheduled payments of principal and interest in the event of adverse economic developments or business conditions.

A holder’s risk of loss from default is significantly greater for lower quality securities than is the case for holders of other debt securities because such securities generally are unsecured and are often subordinated to the rights of other creditors of the issuers of such securities. Investment by the Fund in defaulted securities poses additional risk of loss should nonpayment of principal and interest continue in respect of such securities. Even if such securities are held to maturity, recovery by the Fund of its initial investment and any anticipated income or appreciation will be uncertain. The Fund also may incur additional expenses in seeking recovery on defaulted securities. If an issuer of a security defaults, the Fund may incur additional expenses to seek recovery. In addition, periods of economic uncertainty would likely result in increased volatility for the market prices of lower quality securities as well as the Fund’s NAV. In general, both the prices and yields of lower quality securities will fluctuate.

The secondary market for lower quality securities is concentrated in relatively few market makers and is dominated by institutional investors, including mutual funds, insurance companies and other financial institutions. Accordingly, the secondary market for such securities is not as liquid as, and is more volatile than, the secondary market for higher quality securities. In addition, market trading volume for high yield fixed-income securities generally is lower and the secondary market for such securities could contract under adverse market or economic conditions, independent of any specific adverse changes in the condition of a particular issuer. These factors may have an adverse effect on the market price and the Fund’s ability to dispose of particular portfolio investments. A less developed secondary market also may make it more difficult for the Fund to obtain precise valuations of the high yield securities in its portfolio.

The adoption of new legislation could adversely affect the secondary market for high yield securities and the financial condition of issuers of these securities. The form of any future legislation, and the probability of such legislation being enacted, is uncertain.

In certain circumstances, it may be difficult to determine a security’s fair value due to a lack of reliable objective information. Such instances occur where there is not an established secondary market for the security

19

Table of Contents

or the security is lightly traded. As a result, the Fund’s valuation of a security and the price it is actually able to obtain when it sells the security could differ.

Adverse publicity and investor perceptions, whether or not based on fundamental analysis, may decrease the value and liquidity of lower-quality convertible securities held by the Fund, especially in a thinly traded market. Illiquid or restricted securities held by the Fund may involve special registration responsibilities, liabilities and costs, and could involve other liquidity and valuation difficulties.

The ratings of S&P, Dominion Bond Rating Service Limited (“Dominion”), Moody’s and Fitch evaluate the safety of a lower quality security’s principal and interest payments, but do not address market value risk. Because the ratings of the rating agencies may not always reflect current conditions and events, in addition to using recognized rating agencies and other sources, the Investment Adviser performs its own analysis of the issuers whose lower quality securities the Fund purchases. Because of this, the Fund’s performance may depend more on the Investment Adviser’s credit analysis than is the case of funds investing in higher quality securities.

In determining whether the Fund should continue to hold a security that has been downgraded to a lower quality security subsequent to its purchase by the Fund, the Investment Adviser considers factors such as those relating to the creditworthiness of issuers, the ratings and performance of the securities, the protections afforded the securities and the diversity of the Fund’s investment portfolio. The Investment Adviser monitors the issuers of lower quality securities held by the Fund for their ability to make required principal and interest payments, as well as in an effort to control the liquidity of the Fund so that it can meet redemption requests.

SECURITIES LENDING. In order to generate additional income, the Fund may lend securities to banks, brokers and dealers or other qualified institutions. In exchange, the Fund will receive collateral equal to at least 100% of the value of the securities loaned. Securities lending may represent no more than one-third of the value of the Fund’s total assets (including the loan collateral).

Collateral for loans of portfolio securities made by the Fund may consist of cash, cash equivalents, securities issued or guaranteed by the U.S. government or its agencies or irrevocable bank letters of credit (or any combination thereof). Any cash collateral received by the Fund in connection with these loans may be invested in a variety of short-term investments, either directly or indirectly through registered or unregistered money market funds. Loan collateral (including any investment of the collateral) is not included in the calculation of the percentage limitations described elsewhere in the Prospectus or SAI regarding the Fund’s investments in particular types of securities. The borrower of securities will be required to maintain the market value of the collateral at not less than the market value of the loaned securities, and such value will be monitored on a daily basis.

When the Fund lends its securities, it continues to receive payments equal to the dividends and interest paid on the securities loaned and simultaneously may earn interest on the investment of the cash collateral. Investing the collateral subjects it to market depreciation or appreciation, and the Fund is responsible for any loss that may result from its investment in borrowed collateral. Additionally, the amount of the Fund’s distributions that qualify for taxation at reduced long-term capital gains rates for individuals, as well as the amount of the Fund’s distributions that qualify for the dividends received deduction available to corporate shareholders (together, “qualifying dividends”) may be reduced as a result of the Fund’s securities lending activities. This is because any dividends paid on securities while on loan will not be deemed to have been received by the Fund, and the equivalent amount paid to the Fund by the borrower of the securities will not be deemed to be a qualifying dividend.

The Fund will have the right to terminate a loan at any time and recall the loaned securities within the normal and customary settlement time for securities transactions. Although voting rights, or rights to consent, attendant to securities on loan pass to the borrower, such loans may be called so that the securities may be voted by the Fund if a material event affecting the investment is to occur. As with other extensions of credit there are

20

Table of Contents

risks of delay in recovering, or even loss of rights in, the collateral should the borrower of the securities fail financially.

JPMorgan Chase Bank, N.A. (“JPMorgan”) serves as securities lending agent for the Fund. For such services, JPMorgan receives a percentage of securities lending revenue generated for the Fund.

SECURITIES OF NON-U.S. ISSUERS. The Fund may invest in U.S.-registered U.S. dollar-denominated bonds of non-U.S corporate issuers. The Fund also may invest in U.S. dollar-denominated bonds of non-U.S. corporate issuers offered pursuant to Rule 144A under the Securities Act of 1933, with registration rights. Investing in such securities involves some risks and considerations not typically associated with investing in U.S. issuers. Investment in foreign securities involves special risks. These include market risk, interest rate risk and the risks of investing in securities of foreign issuers and of companies whose securities are principally traded outside the United States on foreign exchanges or foreign over-the-counter markets and in investments denominated in foreign currencies. Market risk involves the possibility that security prices will decline over short or even extended periods. The markets tend to be cyclical, with periods of generally rising prices and periods of generally declining prices. These cycles will affect the value of the Fund to the extent that it invests in foreign securities.

The Fund may invest its assets in the securities of issuers located in geographic regions with securities markets that are highly developed, liquid and subject to extensive regulation, including Europe and Japan. The Economic and Monetary Union of the European Union (“EU”) requires compliance with restrictions on inflation rates, deficits, interest rates, debt levels and fiscal and monetary controls, each of which may significantly affect every country in Europe. Decreasing imports or exports, changes in governmental or EU regulations on trade, changes in the exchange rate of the euro, the default or threat of default by an EU member country on its sovereign debt, and recessions in EU economies may have a significant adverse effect on the economies of EU member countries and their trading partners. The European financial markets have recently experienced volatility and adverse trends due to concerns about the rising government debt levels of several European countries, including Greece, Spain, Ireland, Italy and Portugal. Recent concerns over the level and sustainability of the sovereign debt of the United States have aggravated this volatility. A default or debt restructuring by any European country would adversely impact holders of that country’s debt and sellers of credit default swaps linked to that country’s creditworthiness, which may be located in countries other than those listed above. These events have adversely affected the value and exchange rate of the euro and may continue to significantly affect the economies of every country in Europe, including countries that do not use the euro and non-EU member countries.

The Fund may invest in countries with emerging economies or securities markets. These countries are generally located in the Asia and Pacific regions, the Middle East, Eastern Europe, Central America, South America and Africa. Political and economic structures in many of these countries may be undergoing significant evolution and rapid development, and these countries may lack the social, political and economic stability characteristics of more developed countries.

Unanticipated political, economic or social developments may affect the value of the Fund’s investments in emerging market countries and the availability to the Fund of additional investments in these countries. Some of these countries may have in the past failed to recognize private property rights and may have at times nationalized or expropriated the assets of private companies. There have been occasional limitations on the movements of funds and other assets between different countries. There may be little financial or accounting information available with respect to issuers located in certain parts of such countries, and it may be difficult as a result to assess the value or prospects of an investment in such issuers.

In certain countries, there may be fewer publicly traded securities and the market may be dominated by a few issues or sectors. Issuers and securities markets in such countries are not subject to as extensive and frequent accounting, financial and other reporting requirements or as comprehensive government regulations as are issuers

21

Table of Contents

and securities markets in the U.S. In particular, the assets and profits appearing on the financial statements of emerging country issuers may not reflect their financial position or results of operations in the same manner as financial statements for U.S. issuers. Substantially less information may be publicly available about emerging country issuers than is available about issuers in the United States.

Emerging country securities markets are typically marked by a high concentration of market capitalization and trading volume in a small number of issuers representing a limited number of industries, as well as a high concentration of ownership of such securities by a limited number of investors. The markets for securities in certain emerging countries are in the earliest stages of their development. Even the markets for relatively widely traded securities in emerging countries may not be able to absorb, without price disruptions, a significant increase in trading volume or trades of a size customarily undertaken by institutional investors in the securities markets of developed countries. The limited size of many of these securities markets can cause prices to be erratic for reasons apart from factors that affect the soundness and competitiveness of the securities issuers. For example, prices may be unduly influenced by traders who control large positions in these markets. Additionally, market making and arbitrage activities are generally less extensive in such markets, which may contribute to increased volatility and reduced liquidity of such markets. The limited liquidity of emerging country securities may also affect the Fund’s ability to accurately value its portfolio securities or to acquire or dispose of securities at the price and time it wishes to do so or in order to meet redemption requests.

Certain emerging market countries may have antiquated legal systems, which may adversely impact the Funds. For example, while the potential liability of a shareholder in a U.S. corporation with respect to acts of the corporation is generally limited to the amount of the shareholder’s investment, the notion of limited liability is less clear in certain emerging market countries. Similarly, the rights of investors in emerging market companies may be more limited than those of shareholders in U.S. corporations. In addition, the systems of corporate governance to which issuers in certain emerging countries are subject may be less advanced than the systems to which issuers located in more developed countries are subject, and therefore, shareholders of such issuers may not receive many of the protections available to shareholders of issuers located in more developed countries. These risks may be heightened in Russia.

Transaction costs, including brokerage commissions or dealer mark-ups, in emerging countries may be higher than in developed securities markets. In addition, existing laws and regulations are often inconsistently applied. As legal systems in emerging countries develop, foreign investors may be adversely affected by new or amended laws and regulations. In circumstances where adequate laws exist, it may not be possible to obtain swift and equitable enforcement of the law.

Emerging countries may be subject to a substantially greater degree of economic, political and social instability and disruption than more developed countries. This instability may result from, among other things, the following: (i) authoritarian governments or military involvement in political and economic decision making, including changes or attempted changes in governments through extra-constitutional means; (ii) social unrest associated with demands for improved political, economic or social conditions; (iii) internal insurgencies; (iv) hostile relations with neighboring countries; (v) ethnic, religious and racial disaffection or conflict; and (vi) the absence of developed legal structures governing foreign private investments and private property. A Fund’s investments can also be adversely affected by any increase in taxes or by political, economic or diplomatic developments.

The economies of emerging countries may suffer from unfavorable growth of gross domestic product, rates of inflation and hyperinflation, capital reinvestment, resources, self-sufficiency and balance of payments. Many emerging countries have experienced in the past, and continue to experience, high rates of inflation. In certain countries inflation has at times accelerated rapidly to hyperinflationary levels, creating a negative interest rate environment and sharply eroding the value of outstanding financial assets in those countries. Other emerging countries, on the other hand, have recently experienced deflationary pressures and are in economic recessions.

22

Table of Contents

The economies of many emerging countries are heavily dependent upon international trade and are accordingly affected by protective trade barriers and the economic conditions of their trading partners. In addition, the economies of some emerging countries are vulnerable to weakness in world prices for their commodity exports.

Risks related to currencies and corporate actions are also greater in emerging countries than in developed countries. For example, some emerging countries may have fixed or managed currencies that are not free-floating against the U.S. dollar. Certain emerging countries may experience sudden and large adjustments in their currency, which can have a disruptive and adverse effect on foreign investors. Some emerging countries have a higher risk of currency devaluations, and some of these countries may experience sustained periods of high inflation or rapid changes in inflation rates which can have negative effects on a country’s economy and securities markets. There may be no significant foreign exchange market for certain currencies making it difficult for the Funds to engage in foreign currency transactions. Some emerging countries may impose restrictions on the free conversion of their currencies into foreign currencies, including the U.S. dollar. Corporate action procedures in emerging countries may be less reliable and have limited or no involvement by the depositories and central banks. Lack of standard practices and payment systems can lead to significant delays in payment.

Many emerging countries are highly dependent on foreign loans for their operations. There have been moratoria on, and refinancing of, repayments with respect to these loans. Some of the refinancings have imposed restrictions and conditions on the economies of such nations that have adversely affected their economic growth.

SHORT-TERM INSTRUMENTS AND TEMPORARY INVESTMENTS. The Fund may invest in short-term instruments, including money market instruments, on an ongoing basis to provide liquidity or for other reasons. Money market instruments are generally short-term investments that may include but are not limited to: (i) shares of money market funds (including those advised by NTI); (ii) obligations issued or guaranteed by the U.S. government, its agencies or instrumentalities (including government-sponsored enterprises); (iii) negotiable certificates of deposit (“CDs”), bankers’ acceptances, fixed time deposits, bank notes and other obligations of U.S. and foreign banks (including foreign branches) and similar institutions; (iv) commercial paper rated at the date of purchase “Prime-1” by Moody’s, “A-1” by S&P or, if unrated, of comparable quality as determined by NTI; (v) non-convertible corporate debt securities (e.g., bonds and debentures) with remaining maturities at the date of purchase of not more than 397 days and that satisfy the rating requirements set forth in Rule 2a-7 under the 1940 Act; (vi) repurchase agreements; and (vii) short-term U.S. dollar-denominated obligations of foreign banks (including U.S. branches) that, in the opinion of NTI, are of comparable quality to obligations of U.S. banks which may be purchased by the Fund. Any of these instruments may be purchased on a current or a forward-settled basis.

Time deposits are non-negotiable deposits maintained in banking institutions for specified periods of time at stated interest rates. Bankers’ acceptances are time drafts drawn on commercial banks by borrowers, usually in connection with international transactions. Commercial paper represents short-term unsecured promissory notes issued in bearer form by banks or bank holding companies, corporations and finance companies. Certificates of deposit are negotiable certificates issued against funds deposited in a commercial bank for a definite period of time and earning a specified return. Bankers’ acceptances are negotiable drafts or bills of exchange, normally drawn by an importer or exporter to pay for specific merchandise, which are “accepted” by a bank, meaning, in effect, that the bank unconditionally agrees to pay the face value of the instrument on maturity. Fixed time deposits are bank obligations payable at a stated maturity date and bearing interest at a fixed rate. Fixed time deposits may be withdrawn on demand by the investor, but may be subject to early withdrawal penalties that vary depending upon market conditions and the remaining maturity of the obligation. There are no contractual restrictions on the right to transfer a beneficial interest in a fixed time deposit to a third party. Bank notes generally rank junior to deposit liabilities of banks and pari passu with other senior, unsecured obligations of the bank. Bank notes are classified as “other borrowings” on a bank’s balance sheet, while deposit notes and certificates of deposit are classified as deposits. Bank notes are not insured by the FDIC or any other insurer. Deposit notes are insured by the FDIC only to the extent of $250,000 per depositor per bank.

23

Table of Contents

STANDBY COMMITMENTS. The Fund may enter into standby commitments with respect to municipal instruments held by the Fund. Under a standby commitment, a dealer agrees to purchase at the Fund’s option a specified municipal instrument. Standby commitments may be exercisable by the Fund at any time before the maturity of the underlying municipal instruments and may be sold, transferred or assigned only with the instruments involved.

The Fund expects that standby commitments generally will be available without the payment of any direct or indirect consideration. However, if necessary or advisable, the Fund may pay for a standby commitment either separately in cash or by paying a higher price for municipal instruments which are acquired subject to the commitment (thus reducing the yield to maturity otherwise available for the same securities). The total amount paid in either manner for outstanding standby commitments held by the Fund will not exceed  ¹ ⁄ ₂ of 1% of the value of the Fund’s total assets calculated immediately after each standby commitment is acquired.

The Fund intends to enter into standby commitments only with dealers, banks and broker-dealers which, in the Investment Adviser’s opinion, present minimal credit risks. The Fund will acquire standby commitments solely to facilitate portfolio liquidity and do not intend to exercise their rights thereunder for trading purposes. The acquisition of a standby commitment will not affect the valuation of the underlying municipal instrument. The actual standby commitment will be valued at zero in determining NAV. Accordingly, where the Fund pays directly or indirectly for a standby commitment, the Fund’s costs will be reflected as an unrealized loss for the period during which the commitment is held by the Fund and will be reflected in realized gain or loss when the commitment is exercised or expires.

STRIPPED SECURITIES. To the extent consistent with its investment policies, the Fund may purchase stripped securities. The Treasury Department has facilitated transfers of ownership of zero coupon securities by accounting separately for the beneficial ownership of particular interest coupon and principal payments on Treasury securities through the Federal Reserve book-entry record-keeping system. The Federal Reserve program as established by the Treasury Department is known as “Separate Trading of Registered Interest and Principal of Securities” or “STRIPS.” The Fund may purchase securities registered in the STRIPS program. Under the STRIPS program, the Fund will be able to have its beneficial ownership of zero coupon securities recorded directly in the book-entry record-keeping system in lieu of having to hold certificates or other evidences of ownership of the underlying U.S. Treasury securities.

Other types of stripped securities may be purchased by the Fund, including stripped mortgage-backed securities (“SMBS”). SMBS usually are structured with two or more classes that receive different proportions of the interest and principal distributions from a pool of mortgage-backed obligations. A common type of SMBS will have one class receiving all of the interest, while the other class receives all of the principal. However, in some instances, one class will receive some of the interest and most of the principal while the other class will receive most of the interest and the remainder of the principal. If the underlying obligations experience greater than anticipated prepayments of principal, the Fund may fail to recoup fully its initial investment in these securities. The market value of the class consisting entirely of principal payments generally is extremely volatile in response to changes in interest rates. The yields on a class of SMBS that receives all or most of the interest generally are higher than prevailing market yields on other mortgage-backed obligations because their cash flow patterns also are volatile and there is a risk that the initial investment will not be recouped fully. SMBS issued by the U.S. government (or a U.S. government agency, instrumentality or sponsored enterprise) may be considered liquid under guidelines established by the Trust’s Board of Trustees if they can be disposed of promptly in the ordinary course of business at a value reasonably close to that used in the calculation of the NAV per share.

STRUCTURED SECURITIES. To the extent consistent with its investment objective and strategies, the Fund may purchase structured securities. These fixed-income instruments are structured to recast the investment characteristics of the underlying security or reference asset. If the issuer is a unit investment trust or other special purpose vehicle, the structuring will typically involve the deposit with or purchase by such issuer of specified instruments (such as commercial bank loans or securities) and/or the execution of various derivative transactions,

24

Table of Contents

and the issuance by that entity of one or more classes of securities (structured securities) backed by, or representing interests in, the underlying instruments. The cash flow on the underlying instruments may be apportioned among the newly issued structured securities to create securities with different investment characteristics, such as varying maturities, payment priorities and interest rate provisions, and the extent of such payments made with respect to structured securities is dependent on the extent of the cash flow on the underlying instruments. Investments in these securities may be structured as a class that is either subordinated or unsubordinated to the right of payment of another class. Subordinated structured securities typically have higher rates of return and present greater risks than unsubordinated structured products.

The Fund’s investments in these instruments are indirectly subject to the risks associated with derivative instruments, including, among others, credit risk, default or similar event risk, counterparty risk, interest rate risk, leverage risk and management risk. Because structured securities typically involve no credit enhancement, their credit risk generally will be equivalent to that of the underlying instruments. These securities generally are exempt from registration under the Securities Act. Accordingly, there may be no established trading market for the securities and they may constitute illiquid investments. Structured securities may entail a greater degree of market risk than other types of debt securities because the investor bears the risk of the underlying security or reference asset. Structured securities may also be more volatile, less liquid, and more difficult to price accurately than less complex securities or more traditional debt securities.

SUPRANATIONAL BANK OBLIGATIONS. The Fund, to the extent consistent with its investment objective and strategies, may invest in obligations of supranational banks. Supranational banks are international banking institutions designed or supported by national governments to promote economic reconstruction, development or trade among nations (e.g., the World Bank). Obligations of supranational banks may be supported by appropriated but unpaid commitments of their member countries and there is no assurance that these commitments will be undertaken or met in the future.

TOTAL RATE OF RETURN SWAPS AND INTEREST RATE SWAPS. Swap agreements may be structured in different ways.

The Fund may enter into total rate of return swaps, which are contracts that obligate a party to pay or receive interest in exchange for the payment by the other party of the total return generated by a security, a basket of securities, an index or an index component.

The Fund may enter into interest rate swaps. Interest rate swaps involve the exchange by the Fund with another party of their respective commitments to pay or receive interest, e.g., an exchange of floating rate payments for fixed rate payments with respect to a notional amount of principal.

Some swap transactions, such as interest rate and total return swaps, are entered into on a net basis, i.e., the two payment streams are netted out, with the Fund receiving or paying, as the case may be, only the net amount of the two payments. The Fund will enter into equity swaps only on a net basis. Payments may be made at the conclusion of the swap agreement or periodically during its term. These swaps do not involve the delivery of securities or other underlying assets. Accordingly, the risk of loss with respect to equity swaps is limited to the net amount of payments that the Fund is contractually obligated to make. If the other party to any swap entered into on a net basis defaults, the Fund’s risk of loss consists of the net amount of payments that the Fund is contractually entitled to receive, if any. In contrast, other transactions may involve the payment of the gross amount owed. To the extent that the amount payable by the Fund under a swap is offset by segregated cash or liquid assets, the Fund and the Investment Adviser believe that such transactions do not constitute senior securities under the 1940 Act and, accordingly, will not treat them as being subject to the Fund’s borrowing restrictions.

The Fund will not enter into any swap transactions unless the unsecured commercial paper, senior debt or claims-paying ability of the other party is rated either A, or A-1 or better by S&P Global Ratings (“S&P”), or

25

Table of Contents

Fitch Ratings (“Fitch”); or A or Prime-1 or better by Moody’s Investors Service, Inc. (“Moody’s”), or has received a comparable rating from another organization that is recognized as a nationally recognized statistical rating organization (“NRSRO”) or, if unrated by such rating organization, is determined to be of comparable quality by the Investment Adviser. If there is a default by the other party to a swap transaction, the Fund will have contractual remedies pursuant to the agreements related to the transaction. These contractual remedies, however, may be subject to bankruptcy and insolvency laws that may affect the Fund’s rights as a creditor (e.g., the Fund may not receive the net amount of payments that it is contractually entitled to receive). The swap market has grown substantially in recent years with a large number of banks and investment banking firms acting both as principals and as agents utilizing standardized swap documentation. As a result, the swap market has become relatively liquid in comparison with markets for other similar instruments which are traded in the interbank market.

The use of total rate of return and interest rate swaps is a highly specialized activity which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. If the Investment Adviser is incorrect in its forecasts of market values and/or interest rates, the investment performance of the Fund would be less favorable than it would have been if this investment technique were not used. For a description of CFTC regulations affecting swap transactions and certain other derivatives, see “Futures Contracts and Related Options” below and Appendix B.

TRUST PREFERRED SECURITIES. The Fund may invest in trust preferred securities. Trust preferred securities have the characteristics of both subordinated debt and preferred stock. Generally, trust preferred securities are issued by a trust that is wholly-owned by a financial institution or other corporate entity, typically a bank holding company. The financial institution creates the trust and owns the trust’s common securities. The trust uses the sale proceeds of its common securities to purchase subordinated debt issued by the financial institution. The financial institution uses the proceeds from the subordinated debt sale to increase its capital while the trust receives periodic interest payments from the financial institution for holding the subordinated debt. The trust uses the funds received to make dividend payments to the holders of the trust preferred securities. The primary advantage of this structure is that the trust preferred securities are treated by the financial institution as debt securities for tax purposes and as equity for the calculation of capital requirements.

Trust preferred securities typically bear a market rate coupon comparable to interest rates available on debt of a similarly rated issuer. Typical characteristics include long-term maturities, early redemption by the issuer, periodic fixed or variable interest payments, and maturities at face value. Holders of trust preferred securities have limited voting rights to control the activities of the trust and no voting rights with respect to the financial institution. The market value of trust preferred securities may be more volatile than those of conventional debt securities. Trust preferred securities may be issued in reliance on Rule 144A under the Securities Act and subject to restrictions on resale. There can be no assurance as to the liquidity of trust preferred securities and the ability of holders, such as the Fund, to sell their holdings. In identifying the risks of the trust preferred securities, NTI will look to the condition of the financial institution as the trust typically has no business operations other than to issue the trust preferred securities. If the financial institution defaults on interest payments to the trust, the trust will not be able to make dividend payments to holders of its securities, such as the Fund.

U.S. GOVERNMENT OBLIGATIONS. The Fund may invest in a variety of U.S. Treasury obligations and obligations issued by or guaranteed by the U.S. government or by its agencies, instrumentalities or sponsored enterprises. Not all government obligations carry the same credit support. No assurance can be given that the U.S. government would provide financial support to its agencies, instrumentalities or sponsored enterprises if it were not obligated to do so by law. There is no assurance that these commitments will be undertaken or complied with in the future. In addition, the secondary market for certain participations in loans made to foreign governments or their agencies may be limited. In the absence of a suitable secondary market, such participations generally are considered illiquid.

Examples of U.S. government obligations that may be acquired include U.S. Treasury Bills, Treasury Notes and Treasury Bonds and the obligations of Federal Home Loan Banks, Federal Farm Credit Banks, Federal Land

26

Table of Contents

Banks, the Federal Housing Administration, Farmers Home Administration, Export-Import Bank of the United States, Small Business Administration, the Federal National Mortgage Association, the Government National Mortgage Association, General Services Administration, Central Bank for Cooperatives, the Federal Home Loan Mortgage Corporation, Federal Intermediate Credit Banks and the Maritime Administration.

Securities guaranteed as to principal and interest by the U.S. government or by its agencies, instrumentalities or sponsored enterprises also are deemed to include: (i) securities for which the payment of principal and interest is backed by an irrevocable letter of credit issued by the U.S. government or by any agency, instrumentality or sponsored enterprise thereof; and (ii) participations in loans made to foreign governments or their agencies that are so guaranteed.

VARIABLE AND FLOATING RATE INSTRUMENTS. Variable and floating rate instruments have interest rates that periodically are adjusted either at set intervals or that float at a margin in relation to a generally recognized index rate. These instruments include long-term variable and floating rate bonds where the Fund obtains at the time of purchase the right to put the bond back to the issuer or a third party at par at a specified date and also includes leveraged inverse floating rate instruments (“inverse floaters”). With respect to the variable and floating rate instruments that may be acquired by the Fund, the Investment Adviser will consider the earning power, cash flows and other liquidity ratios of the issuers and guarantors of such instruments and, if the instruments are subject to demand features, will monitor their financial status and ability to meet payment on demand. Where necessary to ensure that a variable or floating rate instrument meets the Fund’s quality requirements, the issuer’s obligation to pay the principal of the instrument will be backed by an unconditional bank letter or line of credit, guarantee or commitment to lend.

The Fund will invest in variable and floating rate instruments only when the Investment Adviser deems the investment to involve minimal credit risk. Unrated variable and floating rate instruments will be determined by the Investment Adviser to be of comparable quality at the time of the purchase to rated instruments that may be purchased by the Fund. In determining weighted average portfolio maturity, an instrument may, subject to the SEC’s regulations, be deemed to have a maturity shorter than its nominal maturity based on the period remaining until the next interest rate adjustment or the time the Fund can recover payment of principal as specified in the instrument. Variable and floating rate instruments eligible for purchase by the Fund include variable amount master demand notes, which permit the indebtedness thereunder to vary in addition to providing for periodic adjustments in the interest rate.

Variable and floating rate instruments also include leveraged inverse floaters. The interest rate on an inverse floater resets in the opposite direction from the market rate of interest to which the inverse floater is indexed. An inverse floater may be considered to be leveraged to the extent that its interest rate varies by a magnitude that exceeds the magnitude of the change in the index rate of interest. The higher degree of leverage inherent in inverse floaters is associated with greater volatility in their market values. Accordingly, the duration of an inverse floater may exceed its stated final maturity. The Fund may deem the maturity of variable and floating rate instruments to be less than their stated maturities based on their variable and floating rate features and/or their put features. Unrated variable and floating rate instruments will be determined by the Investment Adviser to be of comparable quality at the time of purchase to rated instruments which may be purchased by the Fund.

Variable and floating rate instruments including inverse floaters held by the Fund will be subject to the Fund’s limitation on illiquid investments, absent a reliable trading market, when the Fund may not demand payment of the principal amount within seven days. Because there is no active secondary market for certain variable and floating rate instruments, they may be more difficult to sell if the issuer defaults on its payment obligations or during periods when the Fund is not entitled to exercise its demand rights. As a result, the Fund could suffer a loss with respect to these instruments.

WARRANTS. To the extent consistent with its investment objective and policies, the Fund may purchase warrants and similar rights, which are privileges issued by corporations enabling the owners to subscribe to and

27

Table of Contents

purchase a specified number of shares of the corporation at a specified price during a specified period of time. The prices of warrants do not necessarily correlate with the prices of the underlying shares. The purchase of warrants involves the risk that the Fund could lose the purchase value of a warrant if the right to subscribe to additional shares is not exercised prior to the warrant’s expiration. Also, the purchase of warrants involves the risk that the effective price paid for the warrant added to the subscription price of the related security may exceed the value of the subscribed security’s market price such as when there is no movement in the level of the underlying security.

YIELDS AND RATINGS. The yields on certain obligations, including the instruments in which the Fund may invest, are dependent on a variety of factors, including general market conditions, conditions in the particular market for the obligation, financial condition of the issuer, size of the offering, maturity of the obligation and ratings of the issue. The ratings of S&P, Dominion, Moody’s and Fitch represent their respective opinions as to the quality of the obligations they undertake to rate. Ratings, however, are general and are not absolute standards of quality. Consequently, obligations with the same rating, maturity and interest rate may have different market prices. For a discussion of more complete ratings, see Appendix C to this SAI.

ZERO COUPON AND CAPITAL APPRECIATION BONDS AND PAY-IN-KIND SECURITIES. The Fund may invest in zero coupon bonds, capital appreciation bonds and pay-in-kind (“PIK”) securities. Zero coupon and capital appreciation bonds are debt securities issued or sold at a discount from their face value and which do not entitle the holder to any periodic payment of interest prior to maturity or a specified date. The original issue discount varies depending on the time remaining until maturity or cash payment date, prevailing interest rates, the liquidity of the security and the perceived credit quality of the issuer. These securities also may take the form of debt securities that have been stripped of their unmatured interest coupons, the coupons themselves or receipts or certificates representing interests in such stripped debt obligations or coupons. The market prices of zero coupon bonds, capital appreciation bonds and PIK securities generally are more volatile than the market prices of interest bearing securities and are likely to respond to a greater degree to changes in interest rates than interest bearing securities having similar maturities and credit quality.

PIK securities may be debt obligations or preferred shares that provide the issuer with the option of paying interest or dividends on such obligations in cash or in the form of additional securities rather than cash. Similar to zero coupon bonds, PIK securities are designed to give an issuer flexibility in managing cash flow. PIK securities that are debt securities can either be senior or subordinated debt and generally trade flat (i.e., without accrued interest). The trading price of PIK debt securities generally reflects the market value of the underlying debt plus an amount representing accrued interest since the last interest payment.

Zero coupon bonds, capital appreciation bonds and PIK securities involve the additional risk that, unlike securities that periodically pay interest to maturity, the Fund will realize no cash until a specified future payment date unless a portion of such securities is sold and, if the issuer of such securities defaults, the Fund may obtain no return at all on its investment. In addition, even though such securities do not provide for the payment of current interest in cash, the Fund is nonetheless required to accrue income on such investments for each taxable year and generally is required to distribute such accrued amounts (net of deductible expenses, if any) to avoid being subject to tax. Because no cash generally is received at the time of the accrual, the Fund may be required to liquidate other portfolio securities to obtain sufficient cash to satisfy federal tax distribution requirements applicable to the Fund.

INVESTMENT RESTRICTIONS

The Fund is subject to the fundamental investment restrictions enumerated below which may be changed only by a vote of the holders of a majority of the Fund’s outstanding shares as described in “Description of Shares” on page 50.

28

Table of Contents

The Fund may not:

The following descriptions from the 1940 Act may assist shareholders in understanding the above policies and restrictions.

Borrowing . The 1940 Act presently allows a fund to borrow from any bank (including pledging, mortgaging or hypothecating assets) in an amount up to 33-1/3% of its total assets, including the amount borrowed (not including temporary borrowings not in excess of 5% of its total assets).

Senior Securities . Senior securities may include any obligation or instrument issued by a fund evidencing indebtedness.

The 1940 Act generally prohibits funds from issuing senior securities, although it does not treat certain transactions as senior securities, such as certain borrowings, short sales, reverse repurchase agreements, firm commitment agreements and standby commitments, with appropriate earmarking or segregation of assets to cover such obligation.

Lending . Under the 1940 Act, a fund may only make loans if expressly permitted by its investment policies. The Fund’s non-fundamental investment policy on lending is set forth below.

Underwriting . Under the 1940 Act, underwriting securities involves a fund purchasing securities directly from an issuer for the purpose of selling (distributing) them or participating in any such activity either directly or indirectly.

29

Table of Contents

Real Estate . The 1940 Act does not directly restrict a fund’s ability to invest in real estate, but does require that every fund have a fundamental investment policy governing such investments. The Fund has adopted a fundamental policy that would permit direct investment in real estate. However, the Fund has a non-fundamental investment limitation that prohibits it from investing directly in real estate. This non-fundamental policy may be changed only by vote of the Fund’s Board.

Commodities . The 1940 Act does not directly restrict a fund’s ability to invest in commodities, but does require that every fund have a fundamental investment policy governing such investments. The Fund has adopted a fundamental policy that would permit direct investment in commodities. However, the Fund has a non-fundamental investment limitation that prohibits it from investing directly in physical commodities. This non-fundamental policy may be changed only by vote of the Fund’s Board.

The following investment restrictions are non-fundamental policies of the Fund and may be changed by the Board without a vote of shareholders:

The Fund may not:

Notwithstanding other fundamental investment restrictions (including, without limitation, those restrictions relating to issuer diversification, industry concentration and control), the Fund may purchase securities of other investment companies to the full extent permitted under Section 12 or any other provision of the 1940 Act (or any successor provision thereto) or under any regulation or order of the SEC.

For the purpose of industry concentration, in determining industry classification, the Trust may use any one or more of the following: the Bloomberg Industry Group Classification, Standard & Poor’s, J.J. Kenny Municipal

30

Table of Contents

Purpose Codes, FT Interactive Industrial Codes, Securities Industry Classification Codes, Global Industry Classification Standard, Morgan Stanley Capital International industry classification titles or Barclays Capital sector classification scheme. Also for the purpose of industry concentration, industrial development bonds issued by non-governmental issuers may be considered to be issued by members of an industry. Non-governmental issuers are issuers other than the U.S. government (including its agencies and instrumentalities) and state or municipal governments and their political subdivisions.

Any Investment Restriction which involves a maximum percentage (other than the restriction set forth above in Non-Fundamental Investment Restriction No. 5 will not be considered violated unless an excess over the percentage occurs immediately after, and is caused by, an acquisition or encumbrance of securities or assets of the Fund. The 1940 Act requires that if the asset coverage for borrowings at any time falls below the limits described in Non-Fundamental Investment Restriction No. 5, the Fund will, within three days thereafter (not including Sundays and holidays), reduce the amount of its borrowings to an extent that the net asset coverage of such borrowings shall conform to such limits.

CONTINUOUS OFFERING

The method by which Creation Unit Aggregations of shares are created and traded may raise certain issues under applicable securities laws. Because new Creation Unit Aggregations of shares are issued and sold by the Fund on an ongoing basis, at any point a “distribution,” as such term is used in the Securities Act, may occur. Broker-dealers and other persons are cautioned that some activities on their part may, depending on the circumstances, result in their being deemed participants in a distribution in a manner which could render them statutory underwriters and subject them to the prospectus delivery requirement and liability provisions of the Securities Act.

For example, a broker-dealer firm or its client may be deemed a statutory underwriter if it takes Creation Unit Aggregations after placing an order with the Distributor, breaks them down into constituent shares, and sells such shares directly to customers, or if it chooses to couple the creation of a supply of new shares with an active selling effort involving solicitation of secondary market demand for shares. A determination of whether one is an underwriter for purposes of the Securities Act must take into account all the facts and circumstances pertaining to the activities of the broker-dealer or its client in the particular case, and the examples mentioned above should not be considered a complete description of all the activities that could lead to a categorization as an underwriter. Broker-dealer firms should also note that dealers who are not “underwriters” but are effecting transactions in shares, whether or not participating in the distribution of shares, generally are required to deliver a prospectus. This is because the prospectus delivery exemption in Section 4(3) of the Securities Act is not available in respect of such transactions as a result of Section 24(d) of the 1940 Act. Firms that incur a prospectus delivery obligation with respect to shares of the Fund are reminded that, pursuant to Rule 153 under the Securities Act, a prospectus delivery obligation under Section 5(b)(2) of the Securities Act owed to an exchange member in connection with a sale on the Listing Exchange is satisfied by the fact that the prospectus is available at the Listing Exchange upon request. The prospectus delivery mechanism provided in Rule 153 is only available with respect to transactions on an exchange.

PORTFOLIO HOLDINGS

The Board of Trustees of the Trust has adopted a policy on disclosure of portfolio holdings, which it believes is in the best interest of the Fund’s shareholders. The policy provides that neither the Fund nor its Investment Adviser, Distributor or any agent, or any employee thereof (“Fund Representative”) will disclose the Fund’s portfolio holdings information to any person other than in accordance with the policy. For purposes of the policy, “portfolio holdings information” means the Fund’s actual portfolio holdings, as well as non-public information about its trading strategies or pending transactions including the portfolio holdings, trading strategies or pending transactions of any commingled fund portfolio which contains identical holdings as the Fund. Under the policy, neither the Fund nor any Fund Representative may solicit or accept any compensation or other consideration in connection with the disclosure of portfolio holdings information. The Fund Representative may

31

Table of Contents

provide portfolio holdings information to third parties if such information has been included in the Fund’s public filings with the SEC or is disclosed on the Fund’s publicly accessible website. Information posted on the Fund’s website may be separately provided to any person commencing the day after it is first published on the Fund’s website.

Under the policy, each business day before commencement of trading in shares the Fund will disclose on its website the identities and quantities of the Fund’s portfolio holdings that will form the basis for the Fund’s calculation of NAV at the end of the Business Day. In addition, the Fund’s portfolio holdings information will be provided to the Distributor or other agent for dissemination through the facilities of the National Securities Clearing Corporation (“NSCC”) and/or other fee based subscription services to NSCC members and/or subscribers to those other fee-based subscription services, including Authorized Participants (defined below) and to entities that publish and/or analyze such information in connection with the process of purchasing or redeeming Creation Units or trading shares of Fund in the secondary market. The Distributor may also make available portfolio holdings information to other institutional market participants and entities that provide information services. This information typically reflects the Fund’s anticipated holdings on the following business day. The “Authorized Participants” are generally large institutional investors that have been authorized by the Distributor to purchase and redeem large blocks of shares (known as Creation Units) pursuant to legal requirements, including the exemptive order granted by the SEC, to which the Fund offers and redeems shares.

Other than portfolio holdings information made available in connection with the creation/redemption process, as discussed above, portfolio holdings information that is not filed with the SEC or posted on the publicly available website may be provided to third parties only in limited circumstances. Third-party recipients will be required to keep all portfolio holdings information confidential and are prohibited from trading on the information they receive. Disclosure to such third parties must be approved in advance by the Trust’s Chief Compliance Officer (“CCO”). Disclosure to providers of auditing, custody, proxy voting and other similar services for the Fund, as well as rating and ranking organizations, will generally be permitted; however, information may be disclosed to other third parties (including, without limitation, individuals, institutional investors, and Authorized Participants that sell shares of the Fund) only upon approval by the CCO, who must first determine that the Fund has a legitimate business purpose for doing so. In general, each recipient of non-public portfolio holdings information must sign a confidentiality and non-trading agreement, although this requirement will not apply when the recipient is otherwise subject to a duty of confidentiality as determined by the CCO. In accordance with the policy, the recipients who receive non-public portfolio holdings information on an ongoing basis are as follows: the Investment Adviser and its affiliates; the Fund’s independent registered public accounting firm; the Fund’s distributor, administrator and custodian; the Fund’s legal counsel, Drinker Biddle & Reath LLP, the non-interested Trustees’ counsel, Ropes & Gray LLP, the Fund’s financial printer, R.R. Donnelley; and the Fund’s proxy voting service (Institutional Shareholder Services, Inc.). These entities are obligated to keep such information confidential. Third-party providers of custodial or accounting services to the Fund may release non-public portfolio holdings information of the Fund only with the permission of Fund Representatives.

The Fund discloses its portfolio holdings and the percentages they represent of the Fund’s net assets each day the Fund is open for business, on the Fund’s website. More information about this disclosure is available at www.flexshares.com. The Fund may publish on the website complete portfolio holdings information more frequently if it has a legitimate business purpose for doing so. Portfolio holdings will be disclosed through required filings with the SEC. The Fund files its portfolio holdings with the SEC for each fiscal quarter on Form N-CSR (with respect to each annual period and semiannual period) and Form N-Q (with respect to the first and third quarters of the Fund’s fiscal year). Shareholders may obtain the Fund’s Forms N-CSR and N-Q filings on the SEC’s website at www.sec.gov. In addition, the Fund’s Forms N-CSR and N-Q filings may be reviewed and copied at the SEC’s public reference room in Washington, DC. You may call the SEC at 1-800-SEC-0330 for information about the SEC’s website or the operation of the public reference room.

Under the policy, the Board is to receive information, on a quarterly basis, regarding any other disclosures of non-public portfolio holdings information that were permitted during the preceding quarter.

32

Table of Contents