Principal Style Characteristics: Commodity-linked derivative instruments backed by a portfolio of inflation-indexed and other fixed income instruments

The Fund seeks to achieve its investment objective by investing under normal market conditions in commodity-linked derivative instruments backed by a portfolio of inflation-indexed securities and other fixed income instruments. Rather than invest directly in physical commodities, the Fund employs an enhanced index strategy. The commodity-linked derivative instruments in which the Fund primarily invests are linked to the Dow Jones-UBS Commodity Index Total ReturnSM (the "Commodity Index"), which is intended to provide the Fund with exposure to the investment returns of the commodities markets as represented by the Commodity Index without the Fund investing directly in physical commodities. Commodity-linked derivative instruments in which the Fund may invest include commodity index-linked notes, swap agreements, commodity options, futures and options on futures. The assets used to collateralize the commodity-linked derivative instruments are invested in an actively managed portfolio of inflation-indexed bonds and other fixed income securities, including derivative fixed income instruments. The Fund also may invest in common and preferred stocks as well as convertible securities of issuers in commodity-related industries.

Commodities are assets that have tangible properties, such as oil, metals and agricultural products. The Commodity Index tracks the returns of futures contracts in 19 different physical commodities. The Commodity Index is structured to seek to provide diversified commodity exposure by requiring that no related group of commodities may constitute more than 33% of the index and no single commodity may constitute more than 15% or less than 2% of the index. The value of the Commodity Index, and therefore the value of any derivative instruments linked to that index, may be affected by overall market movements and other factors affecting the value of a particular industry or commodity, such as weather, disease, embargoes or political and regulatory developments.

The Fund will seek to gain exposure to the commodity markets primarily through investments in leveraged or unleveraged commodity index-linked notes and through investments in Harbor Cayman Commodity Fund Ltd., a wholly-owned subsidiary of the Fund organized under the laws of the Cayman Islands (the "Subsidiary"). Commodity index-linked notes are derivative debt instruments with principal and/or coupon payments linked to the performance of commodity indices. The Subsidiary has the same investment objective and is subject to substantially the same investment policies and restrictions as the Fund, except that the Subsidiary (unlike the Fund) may invest without limitation in commodity-linked swap agreements and other commodity-linked derivative instruments. The Subsidiary is advised by Harbor Capital Advisors and subadvised by PIMCO. The Fund may invest up to 25% of its total assets in the Subsidiary.

The derivative instruments in which the Fund and the Subsidiary primarily intend to invest are instruments linked to the Commodity Index. However, the Subadviser also seeks to generate additional incremental return over that of the Commodity Index by seeking to take advantage of temporary market fluctuations in the manner in which the Fund creates exposure to the Commodity Index. The Fund's or the Subsidiary's investments in commodity-linked derivative instruments may include exposure to commodity futures with different roll dates, reset dates or contract months than those specified within the Commodity Index. The Fund or the Subsidiary may also invest in derivative instruments linked to the value of a particular commodity or commodity futures contract, or a subset of commodities or commodity futures contracts. As a result, the commodity-linked derivatives component of the Fund's portfolio may deviate from the returns of the Commodity Index. The Fund or the Subsidiary also may over-weight or under-weight its exposure to the Commodity Index, or a subset of commodities, such that the Fund may have a greater or lesser exposure to that index than the value of the Fund's net assets, or greater or lesser exposure to a subset of commodities than is represented by a particular commodity index. These deviations will frequently be the result of temporary market fluctuations, and under normal circumstances the Fund will seek to maintain notional exposure to the Commodity Index within 5% (plus or minus) of the value of the Fund's net assets.

The Fund may invest up to 30% of its total assets in securities denominated in foreign currencies and may invest beyond this limit in U.S. dollar denominated securities of foreign issuers. The Fund may invest up to 10% of its total assets in securities and instruments that are economically tied to emerging market countries. The Fund will normally limit its foreign currency exposure (from non-U.S. dollar-denominated securities or currencies) to 20% of its total assets. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls).

The Fund is non-diversified, which means that it may concentrate its assets in a smaller number of issuers than a diversified fund. In addition, the Fund may concentrate its assets in particular sectors of the commodities market.

Duration. The average portfolio duration of the fixed income portion of the Fund will vary based on the Subadviser's forecast for interest rates, but under normal market conditions is not expected to exceed ten years. Average duration is the weighted average of all bond durations in the Fund's portfolio, and is an approximate measure of the sensitivity of the market value of the Fund's fixed income holdings to changes in interest rates. If the Fund's duration is longer than the market's duration, the Fund's fixed income assets would experience a greater change in value when interest rates are rising or falling than would the market as a whole.

Credit Quality. The average weighted portfolio quality of the fixed income securities held by the Fund is expected to be BBB or better. The Fund may invest up to 10% of its total assets in below investment-grade securities, commonly referred to as high-yield or junk bonds, rated B or higher by Moody's, or equivalently rated by S&P or Fitch, or, if unrated, determined by the Subadviser to be of comparable quality.

Investors considering an investment in the Fund should be prepared to accept significant volatility in the Fund's performance, particularly over shorter time periods. The Fund is not intended to serve as a core holding in an investor's portfolio but instead should represent only a small portion of an investor's overall diversified portfolio. Investors considering an investment in this Fund should be sure they carefully read and understand the investment strategies employed and the heightened risks associated with those strategies.

There is no guarantee that the investment objective of the Fund will be achieved. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Commodities and commodity-linked derivative instruments can be significantly more volatile than other securities, such as stocks or bonds. Similarly, the Commodity Index can be significantly more volatile than broad market equity and fixed income indices. The value of your investment in the Fund may go down, which means that you could lose money on your investment in the Fund or the Fund may not perform as well as other possible investments. Principal risks include:

Commodity risk: The Fund's investments in commodity-linked derivative instruments may subject the Fund to significantly greater volatility than investments in traditional securities. The value of commodity-linked derivative instruments may be affected by changes in overall market movements, commodity index volatility, changes in interest rates or factors affecting a particular industry or commodity, such as a drought, floods, weather, livestock disease, embargoes, tariffs and international economic, political and regulatory developments. The Fund may concentrate its assets in a particular sector of the commodities market (such as oil, metal or agricultural products). As a result, the Fund may be more susceptible to risks associated with those sectors.

Fixed income security risk: Fixed income securities fluctuate in price in response to various factors, including changes in interest rates, changes in market conditions and issuer-specific events.

Subsidiary risk: By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary's investments. The derivatives and other investments held by the Subsidiary generally are similar to those that are permitted to be held by the Fund and are subject to the same risks that apply to similar investments if held directly by the Fund. The Subsidiary is not registered under the Investment Company Act of 1940 (the "Investment Company Act"), and, unless otherwise noted in this prospectus, is not subject to all of the investor protections of the Investment Company Act. In addition, changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Fund and/ or the Subsidiary to operate as described in this Prospectus and the Statement of Additional Information and could adversely affect the Fund.

Interest rate risk: As nominal interest rates rise, the values of fixed income securities held by the Fund are likely to decrease. Securities with longer durations tend to be more sensitive to changes in interest rates, and are usually more volatile than securities with shorter durations. For example, if the Fund has an average duration of ten years, a 1% increase in interest rates generally would result in a 10% decrease in the Fund's value. A nominal interest rate can be described as the sum of a real interest rate and an expected inflation rate. Inflation-indexed securities, including U.S. Treasury inflation protected securities ("TIPS"), decline in value when real interest rates rise. In certain interest rate environments, such as when real interest rates are rising faster than nominal interest rates, inflation-indexed securities may experience greater losses than other fixed income securities with similar durations.

Credit risk: The issuer of a security owned by the Fund could default on its obligation to pay principal and/or interest or its credit rating could be downgraded. This risk is higher for below investment-grade bonds.

Prepayment risk: When interest rates are declining, the issuer of a pass-through security, such as a mortgage-backed or an asset-backed security, may exercise its option to prepay principal earlier than scheduled, forcing the Fund to reinvest in lower yielding securities.

Selection risk: The Subadviser's judgment about the attractiveness, value and potential appreciation of a particular issuer's securities could be incorrect.

Derivatives risk: The value of derivative instruments held by the Fund may not change in the manner expected by the Subadviser, which could result in disproportionately large losses to the Fund.

Foreign securities risk: Prices of the Fund's foreign securities may go down because of unfavorable changes in foreign currency exchange rates, foreign government actions, political instability or the more limited availability of accurate information about foreign issuers. Also, a decline in the value of foreign currencies relative to the U.S. dollar will reduce the unhedged value of securities denominated in those currencies. Foreign securities are sometimes less liquid and harder to value than securities of U.S. issuers. These risks are more significant for issuers in emerging market countries.

Non-diversification risk: Because the Fund is non-diversified and may invest a greater percentage of its assets in securities of a single issuer and in a relatively small number of issuers, it is more susceptible to risks associated with a single economic, political or regulatory occurrence than a more diversified portfolio. Some of those issuers may also present substantial credit or other risks.

Short sales risk: If the price of securities sold short increases, the Fund would be required to pay more to replace the borrowed securities than the Fund received on the sale of the securities. Because there is theoretically no limit to the amount of the increase in price of the borrowed securities, the Fund's risk of loss on a short sale is potentially unlimited.

Mortgage risk: Mortgage derivatives in the Fund's portfolio may have especially volatile prices because the imbedded leverage can magnify the impact of the extension or contraction event on the underlying cash flow. There may be a greater risk that the Fund could lose money due to prepayment and extension risks because the Fund invests heavily at times in mortgage-related securities.