Vanguard ST Govt Securities Active Inv (VSGBX)

Under normal circumstances, the fund will invest at least 80% of its assets in bonds issued or guaranteed by the U.S. government and its agencies and instrumentalities, many of which are not backed by the full faith and credit of the U.S. government. The majority of these investments will have a dollar-weighted average maturity of 1 to 4 years. The fund may invest in derivatives, such as options, futures contracts, and other swap agreements.