Thornburg Investment Income Builder Fund Class I

The investment seeks to provide a level of current income which exceeds the average yield on U.S. stocks; long-term capital appreciation is a secondary objective. The fund pursues its investment goals by investing in a broad range of income producing securities, primarily including stocks and bonds. It will under normal conditions invest at least 80% of its assets in income-producing securities, and at least 50% of its assets in common stocks.