BIFIX : William Blair Income Fund Class I

Fund Summary

The investment seeks a high level of current income with relative stability of principal. The fund invests at least 90% of its total assets in the following: (a) U.S. dollar-denominated corporate debt securities (domestic or foreign) with long-term ratings of "A -" or better, or an equivalent rating; (b) obligations of or guaranteed by the U.S. government, its agencies or instrumentalities; (c) collateralized obligations and (d) commercial paper obligations rated within the highest grade by one of the Rating Organizations.