This document discusses risk-adjusted return, which refines an investment's return by measuring the amount of risk required to produce that return. There are several common measures of risk-adjusted return, including the Sharpe ratio, Treynor ratio, and Jensen's measure. These ratios allow investors to compare investments with different risk and return profiles to determine which has the best risk-adjusted performance and whether the risk was worthwhile. No single measure is perfect, so experts recommend using multiple ratios to evaluate investments on a risk-adjusted basis.