Strategy. Although the Fund has adopted a policy to invest, under normal market conditions, at least 80% of its assets in debt securities issued or guaranteed by the U.S. government and its agencies and instrumentalities, and in repurchase agreements in respect of such securities, the Fund's investment adviser, First Pacific Advisors, LP (the "Adviser"), expects to invest under normal market conditions, at least 90% of the Fund's assets in such securities. The securities in which the Fund invests include those backed by the full faith and credit of the U.S government (such as Treasury Notes, Treasury Bills and the Government National Mortgage Association ("GNMA")) and those that are issued, but neither insured nor guaranteed by, the U.S. government (such as securities … Show more… Although the Fund has adopted a policy to invest, under normal market conditions, at least 80% of its assets in debt securities issued or guaranteed by the U.S. government and its agencies and instrumentalities, and in repurchase agreements in respect of such securities, the Fund's investment adviser, First Pacific Advisors, LP (the "Adviser"), expects to invest under normal market conditions, at least 90% of the Fund's assets in such securities. The securities in which the Fund invests include those backed by the full faith and credit of the U.S government (such as Treasury Notes, Treasury Bills and the Government National Mortgage Association ("GNMA")) and those that are issued, but neither insured nor guaranteed by, the U.S. government (such as securities issued by the Federal Home Loan Mortgage Corporation ("FHLMC")). The Fund may also invest up to 10% of its total assets in other investment grade debt instruments, shares of exchange-traded funds ("ETFs") and other mutual funds (including money market fund shares), reverse repurchase agreements, cash and cash equivalent securities. Investment grade debt instruments are those rated in BBB- or higher categories by S&P Global Ratings, a division of McGraw Hill Companies Inc. ("S&P") or the equivalent rating by any other nationally recognized statistical rating organization ("NRSRO") such as Moody's Investors Service, Inc. ("Moody's"), Fitch Ratings Ltd. ("Fitch") and others, or, if unrated, determined by the Adviser to be of comparable credit quality. Under normal market conditions, the effective duration of the Fund's portfolio is expected to be approximately one to five years. The Fund may invest in individual bonds of any maturity or duration. Generally, the longer a bond's duration, the more sensitive its price is to interest rate fluctuations. The change in the value of a fixed-income security or portfolio can be approximated by multiplying its duration by a change in interest rates. For example, the market price of a fixed-income security with a duration of three years would be expected to decline 3% if interest rates rose by one percentage point, all things being equal. Conversely, the market price of the same security would be expected to increase 3% if interest rates fell by one percentage point, all things being equal. The Fund may engage in frequent and active trading of portfolio securities to achieve the Fund's investment objective. The Adviser may sell all or a portion of a position held in the Fund when in its opinion one or more of the following occurs, among other reasons: (1) there has been a negative change in the credit quality of the issuer; (2) the portfolio manager has identified a more attractive opportunity; (3) when the portfolio manager seeks to manage the Fund's duration or tax position; or (4) the Fund requires cash to meet redemption requests. Show less