AEMDX Acadian Emerging Markets Debt Fund Insti (MM)

PRINCIPAL RISKS

As with all mutual funds, a shareholder is subject to the risk that his or her investment could lose money. A Fund share is not a bank deposit and it is not insured or guaranteed by the FDIC or any government agency. The principal risk factors affecting shareholders' investments in the Fund are set forth below.

DIVIDEND PAYING STOCKS RISK -- The Fund's emphasis on dividend-paying stocks involves the risk that such stocks may fall out of favor with investors and underperform the market. Also, a company may reduce or eliminate its dividend.

EQUITY RISK -- Since it purchases equity securities, the Fund is subject to the risk that stock prices will fall over short or extended periods of time. Historically, the equity markets have moved in cycles, and the value of the Fund's equity securities may fluctuate drastically from day to day. Individual companies may report poor results or be negatively affected by industry and/ or economic trends and developments. The prices of securities issued by such companies may suffer a decline in response. These factors contribute to price volatility, which is the principal risk of investing in the Fund.

FOREIGN COMPANY RISK -- Investing in foreign companies, including direct investments and through ADRs which are traded on U.S. exchanges and represent an ownership interest in a foreign security, poses additional risks since political and economic events unique to a country or region will affect those markets and their issuers. These risks will not necessarily affect the U.S. economy or similar issuers located in the United States. In addition, investments in foreign companies are generally denominated in a foreign currency. As a result, changes in the value of those currencies compared to the U.S. dollar may affect (positively or negatively) the value of the Fund's investments. These currency movements may occur separately from, and in response to, events that do not otherwise affect the value of the security in the issuer's home country. Differences in tax and accounting standards and difficulties obtaining information about foreign companies can negatively affect investment decisions. The Fund's investments in foreign securities are also subject to the risk that the securities may be difficult to value and/or valued incorrectly. While ADRs provide an alternative to directly purchasing the underlying foreign securities in their respective national markets and currencies, investments in ADRs continue to be subject to many of the risks associated with investing directly in foreign securities.

FOREIGN CURRENCY RISK -- As a result of the Fund's investments in securities or other investments denominated in, and/or receiving revenues in, foreign currencies, the Fund will be subject to currency risk. Currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar, in which case, the dollar value of an investment in the Fund would be adversely affected.

REIT RISK -- REITs are pooled investment vehicles that own, and usually operate, income-producing real estate. REITs are susceptible to the risks associated with direct ownership of real estate, such as the following:
declines in property values; increases in property taxes, operating expenses, interest rates or competition; overbuilding; zoning changes; and losses from casualty or condemnation. REITs typically incur fees that are separate from those of the Fund. Accordingly, the Fund's investments in REITs will result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the REITs' operating expenses, in addition to paying Fund expenses. REIT operating expenses are not reflected in the fee table and example in this Prospectus.

ROYALTY TRUST RISK -- The Fund may invest in royalty trusts. A royalty trust generally acquires an interest in natural resource companies and distributes the income it receives to the investors of the royalty trust. A sustained decline in demand for crude oil, natural gas and refined petroleum products could adversely affect income and royalty trust revenues and cash flows. Factors that could lead to a decrease in market demand include a recession or other adverse economic conditions, an increase in the market price of the underlying commodity, higher taxes or other regulatory actions that increase costs, or a shift in consumer demand for such products. A rising interest rate environment could adversely impact the performance of royalty trusts. Rising

interest rates could limit the capital appreciation of royalty trusts because of the increased availability of alternative investments at more competitive yields. Royalty trust operating expenses are not reflected in the fee table and example in the Prospectus and the Fund's investment in royalty trusts may result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the royalty trusts' operating expenses, in addition to paying Fund expenses.

SMALL- AND MID-CAPITALIZATION COMPANY RISK -- The small- and mid-capitalization companies in which the Fund may invest may be more vulnerable to adverse business or economic events than larger, more established companies. In particular, these small- and mid-sized companies may pose additional risks, including liquidity risk, because these companies tend to have limited product lines, markets and financial resources, and may depend upon a relatively small management group. Therefore, small- and mid-cap stocks may be more volatile than those of larger companies. These securities may be traded over-the-counter or listed on an exchange.

TRUST PREFERRED SECURITIES RISK -- Trust preferred securities are preferred stocks issued by a special purpose trust subsidiary backed by subordinated debt of the corporate parent. These securities typically bear a market rate coupon comparable to interest rates available on debt of a similarly rated company. The securities are generally senior in claim to standard preferred stock but junior to other bondholders. Trust preferred securities are subject to unique risks, which include the fact that dividend payments will only be paid if interest payments on the underlying obligations are made, which interest payments are dependent on the financial condition of the parent corporation and may be deferred for up to 20 consecutive quarters. There is also the risk that the underlying obligations, and thus the trust preferred securities, may be prepaid after a stated call date or as a result of certain tax or regulatory events, resulting in a lower yield to maturity.