The TIAA-CREF High Yield Fd Retirement Class (TIHRX) is a mutual fund that focuses on investing in high-yield bonds and other fixed-income securities. It is designed specifically for retirement accounts and aims to provide investors with a steady stream of income through its high-yield investments. This fund is managed by TIAA-CREF, a leading financial services company, and is suitable for investors looking for a conservative, income-generating option for their retirement savings.