The Calvert Bond Fund Class C (CSBCX) is a mutual fund that primarily invests in a diverse portfolio of fixed-income securities, such as government and corporate bonds. This fund is managed by Calvert Research and Management, a socially responsible investment firm that considers environmental, social, and governance factors in their investment decisions. The Class C shares of this fund have a lower expense ratio compared to other share classes, making it a more cost-effective option for investors. Overall, the Calvert Bond Fund Class C aims to provide investors with a steady stream of income and potential capital appreciation while aligning with their values.