The fund normally invests in commodity-linked derivative instruments, inflation-indexed securities, U.S. Treasury securities, cash, and cash equivalents and invests up to 25% of assets in a wholly-owned subsidiary organized under the laws of the Cayman Islands that invests in commodity-linked derivative instruments including commodity-linked notes; total return swaps, options, and forward contracts based on the value of commodities or commodities indexes; and commodity futures. It invests in domestic and foreign issuers.