The T. Rowe Price Emerging Markets Bond Fund Z Class (TREZX) is a mutual fund that focuses on investing in fixed-income securities issued by companies and governments in emerging markets. This fund aims to provide investors with exposure to the potential growth and diversification opportunities in these developing economies. The "Z Class" designation indicates that this fund is designed for institutional investors and has a lower expense ratio compared to other share classes. Overall, TREZX offers a way for investors to access the bond markets of emerging economies through the expertise of T. Rowe Price, a well-respected investment management firm.