The Fund is non-diversified, which means that it may concentrate its assets in a smaller number of issuers than a diversified fund.

Inflation-indexed bonds are fixed income securities that are structured to provide protection against inflation. The value of the bond's principal or the interest income paid on the bond is adjusted to track changes in an official inflation measure. The U.S. Treasury uses the Consumer Price Index for Urban Consumers as the inflation measure for U.S. Treasury Inflation-Protected Securities ("TIPS"). Inflation-indexed bonds issued by foreign governments are generally adjusted to reflect a comparable inflation index, calculated by that government. "Real return" equals total return less the estimated cost of inflation, which is typically measured by the change in an official inflation measure.

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. Foreign currency exposure (from non-U.S. dollar denominated securities or currencies) normally will be limited to 20% of the Fund's total assets. The Fund also may invest up to 10% of its total assets in securities of issuers based in countries with developing (or "emerging market") economies.

Under normal market conditions, the Fund expects to invest at least 80% of its net assets, plus borrowings for investment purposes, in inflation-indexed bonds of varying maturities issued by the U.S. government, non-U.S. governments, their agencies or instrumentalities, and corporations, which may represented by forwards or derivatives such as options, futures contracts or swap agreements. Assets not invested in inflation-indexed bonds may be invested in other types of fixed income securities.

The Fund may invest all of its assets in derivative instruments, such as options, futures contracts or swap agreements, or in mortgage- or asset-backed securities. The Fund may, without limitation, seek to obtain market exposure to the securities in which it 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 may engage in short selling, which is the sale by the Fund of a borrowed security. Because the Fund is obligated to replace the borrowed security, the Fund would benefit from the short sale if the price of the security declines before it is replaced. The Fund may also invest up to 10% of its total assets in perferred stocks.

Credit Quality. The Fund invests primarily in investment-grade debt securities, but may invest up to 10% of its total assets in below investment-grade securities, commonly referred to as "high-yield" or "junk" bonds. For all securities other than mortgage-related securities, the Fund may invest in below investment-grade securities only if they are rated B or higher by Moody's, S&P or Fitch, or, if unrated, determined to be of comparable quality. For mortgage-related securities, the Fund may invest in securities of any credit quality, including those rated below B.

Duration. The average portfolio duration of this Fund, as calculated by the Subadviser, normally varies within three years (plus or minus) of the duration of the Barclays Capital U.S. TIPS Index, which as of December 31, 2012 was 6.07 years. Average duration is a weighted average of all fixed income security durations in the Fund's portfolio, and is an approximate measure of the sensitivity of the market value of the Fund's holdings to changes in interest rates. If the Fund's duration is longer than the market's duration, the Fund would experience a greater change in the value of its assets when interest rates are rising or falling than would the market as a whole.

Interest rate risk: As nominal interest rates rise, the value of fixed income securities held by the Fund are likely to decrease and reduce the value of the Fund's portfolio. 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, a 5 year average duration generally means the fixed income security will decrease in value by 5% if interest rates rise by 1%.

A nominal interest rate can be described as the sum of a real interest rate and an expected inflation rate. Inflation-indexed securities, including 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. Interest rates in the U.S. are at, or near, historic lows, which may increase the Fund's exposure to risks associated with rising rates.

Credit risk: The issuer of a security owned by the Fund could default on its obligation to pay principal or interest or its credit rating could be downgraded. Likewise, a counterparty to a derivative or other contractual instrument owned by the Fund could default on its obligation. This risk is higher for below investment-grade securities.

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 security may 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.

Leveraging risk: The Fund's use of certain investments, such as derivative instruments or reverse repurchase agreements, and certain transactions, such as securities purchased on a when-issued, delayed delivery or forward commitment basis can give rise to leverage within the Fund's portfolio, which could cause the Fund's returns to be more volatile than if leverage had not been used.

Foreign securities risk: Because the Fund may invest in securities of foreign issuers, an investment in the Fund is subject to special risks in addition to those of U.S. securities. These risks include heightened political and economic risks, greater volatility, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, and less stringent investor protection and disclosure standards of foreign markets. 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. Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market.

Non-diversification risk:Because the Fund is non-diversified, which means it may invest a greater percentage of its assets in securities of a single issuer or 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 embedded 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.