The PIMCO High Yield Fund Class I-3 (PHNNX) is a mutual fund that primarily invests in high-yield bonds and other fixed-income securities. It is managed by PIMCO, a global investment management firm known for its expertise in fixed-income investments. The fund aims to provide investors with a high level of current income while also seeking capital appreciation. As a Class I-3 fund, it is designed for institutional investors and has a lower expense ratio compared to other classes of the same fund. With a focus on high-yield bonds, this fund carries a higher level of risk but also has the potential for higher returns.