The MainStay MacKay High Yield Corp Bond Fund SIMPLE Class (MHHSX) is a mutual fund that primarily invests in high-yield corporate bonds. This fund aims to provide investors with a steady stream of income through interest payments from these bonds. The "SIMPLE" in the fund name stands for "Savings Incentive Match Plan for Employees," indicating that this fund may be offered as part of an employer-sponsored retirement plan. With a focus on high-yield bonds, this fund may carry a higher level of risk but also has the potential for higher returns.