The AB Bond Fund, Inc.-AB High Yield Advisor Class (HIYYX) is a mutual fund that focuses on investing in high-yield bonds. This fund is managed by AB, a global investment management firm, and is designed for investors seeking higher returns through fixed income investments. The fund's portfolio consists of a diverse mix of high-yield bonds from various industries and sectors, providing potential for both income and capital appreciation. As an advisor class fund, it may have lower fees and minimum investment requirements compared to other share classes. Overall, the HIYYX mutual fund offers investors the opportunity to diversify their portfolio and potentially earn higher returns through high-yield bond investments.