The Fidelity Managed Retirement Income Fund Class K (FRKMX) is a mutual fund that is designed to provide investors with a steady stream of income during their retirement years. This fund is managed by Fidelity Investments and is specifically tailored for investors who are approaching or already in retirement. It aims to achieve this goal by investing in a mix of stocks, bonds, and other income-generating assets. The Class K shares of this fund are typically offered to institutional investors and have a lower expense ratio compared to other share classes. Overall, the Fidelity Managed Retirement Income Fund Class K is a suitable option for those looking for a reliable source of income in their retirement years.