The fund is mandated to allocate a minimum of 80% of its assets to corporate debt securities, encompassing convertible debt instruments. While its core holdings typically focus on U.S. dollar-denominated securities that possess at least the lowest investment-grade rating upon acquisition, the fund has the flexibility to invest up to 20% of its portfolio in higher-risk debt. This includes bonds rated below investment grade—often referred to as high-yield or "junk" bonds—as well as foreign debt securities not denominated in the U.S. dollar.