Strategy. Under normal circumstances, we invest: at least 90% of the Funds net assets in U.S. Government obligations; and up to 10% of the Funds net assets in non-government mortgage- and asset-backed securities. We invest principally in U.S. Government obligations, including debt securities issued or guaranteed by the U.S. Treasury, U.S. Government agencies or government-sponsored entities. We will purchase only securities that are rated, at the time of purchase, within the two highest rating categories assigned by a Nationally Recognized Statistical Ratings Organization, or are deemed by us to be of comparable quality. As part of our investment strategy, we may enter into mortgage dollar rolls. While we may purchase securities of any maturity or duration, under normal circumstances, we expect … Show more… Under normal circumstances, we invest: at least 90% of the Funds net assets in U.S. Government obligations; and up to 10% of the Funds net assets in non-government mortgage- and asset-backed securities. We invest principally in U.S. Government obligations, including debt securities issued or guaranteed by the U.S. Treasury, U.S. Government agencies or government-sponsored entities. We will purchase only securities that are rated, at the time of purchase, within the two highest rating categories assigned by a Nationally Recognized Statistical Ratings Organization, or are deemed by us to be of comparable quality. As part of our investment strategy, we may enter into mortgage dollar rolls. While we may purchase securities of any maturity or duration, under normal circumstances, we expect the portfolios overall dollar-weighted average effective duration to be less than that of a 3-year U.S. Treasury note. Dollar-Weighted Average Effective Duration is an aggregate measure of the sensitivity of a funds fixed income portfolio securities to changes in interest rates. As a general matter, the price of a fixed income security with a longer effective duration will fluctuate more in response to changes in interest rates than the price of a fixed income security with a shorter effective duration. We invest in debt securities that we believe offer competitive returns and are undervalued, offering additional income and/or price appreciation potential, relative to other debt securities of similar credit quality and interest rate sensitivity. As part of our investment strategy, we invest in mortgage-backed securities guaranteed by U.S. Government agencies that we believe will sufficiently outperform U.S. Treasuries. We may sell a security that has achieved its desired return or if we believe the security or its sector has become overvalued. We may also sell a security if a more attractive opportunity becomes available or if the security is no longer attractive due to its risk profile or as a result of changes in the overall market environment. Show less