The MassMutual RetireSMART 2020 Fund Class I (MRTDX) is a mutual fund designed for investors who are planning to retire in the year 2020. This fund aims to provide a balanced and diversified portfolio of investments to help investors reach their retirement goals. It is managed by MassMutual, a reputable financial services company, and offers a low-cost option for retirement planning. The Class I shares of this fund are typically available to institutional investors and have a lower expense ratio compared to other share classes. Overall, the MassMutual RetireSMART 2020 Fund Class I is a suitable choice for investors looking for a conservative and cost-effective option for their retirement savings.