Strategy. The fund will normally invest at least 80% of its assets in, or derive at least 80% of its income from, securities that are exempt from regular federal income tax. Such securities consist of municipal bonds, which are debt obligations that pay interest that is exempt from federal income taxation, with payments made from a wide variety of sources, including governmental revenue streams and private enterprises. The fund will invest up to 20% of its assets in private activity bonds whose interest is generally subject to the federal alternative minimum tax. The fund will invest at least 80% of its assets in bonds and other debt instruments. The fund may invest in insured municipal bonds, which are municipal bonds that … Show more… The fund will normally invest at least 80% of its assets in, or derive at least 80% of its income from, securities that are exempt from regular federal income tax. Such securities consist of municipal bonds, which are debt obligations that pay interest that is exempt from federal income taxation, with payments made from a wide variety of sources, including governmental revenue streams and private enterprises. The fund will invest up to 20% of its assets in private activity bonds whose interest is generally subject to the federal alternative minimum tax. The fund will invest at least 80% of its assets in bonds and other debt instruments. The fund may invest in insured municipal bonds, which are municipal bonds that are insured generally as to the timely payment of interest and repayment of principal. In addition, the fund may invest in debt securities of varying credit quality, including up to 10% of its assets in debt securities rated BB+ or below and Ba1 or below by Nationally Recognized Statistical Rating Organizations designated by the funds investment adviser, or unrated but determined by the funds investment adviser to be of equivalent quality. Securities rated BB+ or below and Ba1 or below are sometimes referred to as junk bonds. The fund may invest in debt securities of any maturity. The fund will maintain a weighted average effective portfolio duration that is within 1 year of that of the Bloomberg Municipal Short 1-5 Years Index. The fund is nondiversified, which means it may invest a greater portion of its assets in fewer issuers than would otherwise be the case. The funds assets are managed by a team of portfolio managers. Under this approach, the funds managers work together to oversee the funds entire portfolio. For more information regarding the investment process of the fund, see the Management and organization section of this prospectus. The fund relies on the professional judgment of its investment adviser to make decisions about the funds portfolio investments. The basic investment philosophy of the investment adviser is to seek to invest in attractively priced securities that, in its opinion, represent good investment opportunities. Securities may be sold when the investment adviser believes that they no longer represent relatively attractive investment opportunities. Show less