Fidelity Investments of Boston has created a new index fund of funds. The new fund, the Fidelity Four-in-One Index Fund, invests in the Spartan Market, the Spartan Extended Market, the Spartan International and the Fidelity U.S. Bond index funds. The fund will invest 55 percent of assets in the Spartan Market Index Fund, which mimics the Standard & Poor's 500 Index, and split remaining assets equally between the three other funds.

Fidelity is introducing the new fund to the market with advertisements that tell investors Fidelity's index funds "can help you track the market - But our actively managed funds can help you do even better."

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