Redemption yield, also known as yield to maturity or yield to call, is the percentage rate of return on a fixed-income investment that includes both the interest earned and the capital gain or loss from the investment's sale or maturity. Synonyms for redemption yield include yield to maturity, internal rate of return, and required yield. Additionally, terms such as yield to worst, yield to put, and yield to sinking fund also refer to similar concepts as redemption yield. Understanding the different ways to describe this important investment metric is crucial for investors looking to make informed decisions about their fixed-income portfolio.