The T. Rowe Price Tax-Free High Yield Fund - I Class (PTYIX) is a mutual fund that focuses on investing in high-yield municipal bonds that are exempt from federal income tax. This fund is managed by T. Rowe Price, a well-respected investment management firm, and is designed for investors seeking tax-free income. The "I Class" designation indicates that this fund is only available to institutional investors, such as pension funds and endowments. With a focus on high-yield municipal bonds, this fund offers the potential for attractive returns while also providing tax benefits for investors.