Calvert Ultra-Short Duration Income Fund Class A

The fund seeks to achieve its investment objective by investing, under normal circumstances, at least 80% of its net assets (including borrowings for investment purposes) in a portfolio of floating-rate securities (e.g., corporate floating-rate securities) and securities with durations of less than or equal to one year. The manager generally defines ultra-short duration securities as those with durations of less than or equal to one year.