The Loomis Sayles Core Plus Bond Fund Class Y (NERYX) is a mutual fund that primarily invests in a diverse portfolio of fixed-income securities, including government and corporate bonds, mortgage-backed securities, and other debt instruments. The fund aims to provide investors with a steady stream of income and potential for capital appreciation by actively managing its bond holdings and taking advantage of market opportunities. With a focus on high-quality and undervalued bonds, the Loomis Sayles Core Plus Bond Fund Class Y offers a balanced approach to fixed-income investing.