The Fund invests primarily in interest income producing U.S. Treasury securities such as bills, notes, and bonds and fixed income ETFs that invest primarily in U.S. Treasuries. The Fund targets an average securities portfolio duration of one year or less but does not restrict individual security maturity. Duration is a measure of the price sensitivity of a debt instrument when interest rates change. For example, if a note has a duration of 1 year, a 1 percent rise in rates would result in a 1percent decline in price. The adviser selects securities to maximize portfolio yield within the current duration target and the adviser sells securities primarily to adjust portfolio duration.