The fund will invest at least 80% of its net assets in securities issued or guaranteed by the U.S. government or by its agencies, instrumentalities or sponsored enterprises and repurchase agreements relating to such securities. Its dollar-weighted average maturity, will range between one and ten years. The fund may also make significant investments in securities issued by U.S. government-sponsored enterprises. Obligations issued by U.S. government-sponsored enterprises are neither issued nor guaranteed by the U.S. Treasury and therefore are not backed by the full faith and credit of the United States.