Upside capture (often called upside capture ratio, UCR) is a metric that measures how a portfolio's returns behave in periods when the benchmark posts positive returns. It is typically expressed as a percentage: a value of 100% means the portfolio captures the same magnitude of upside moves as the benchmark; above 100% indicates larger participation in up moves, while below 100% signals smaller participation. The calculation uses only up-market periods and compares portfolio return to benchmark return for those periods.
Common practice computes the ratio by examining returns in periods where the benchmark is positive. For those periods, the portfolio return is divided by the benchmark return and the results are averaged, then multiplied by 100 to convert to a percentage. The precise method (aggregate vs. per-period averages) can affect the value, so it is important to know the chosen approach when comparing figures.
A higher upside capture implies greater participation in rising markets relative to the benchmark; a value below 100% suggests smaller participation. This metric is typically evaluated alongside downside capture to describe a portfolio's reaction to market movements, emphasizing the ascent phase rather than absolute level of returns.
Upside capture depends on the chosen benchmark, the time window, and the return frequency (monthly, quarterly, etc.). It does not project future results and can be influenced by outliers or market regimes; cross-checking with downside capture and other performance measures provides broader context.
In a period when the benchmark rises 6%, a portfolio with an upside capture of 120% would rise about 7.2% in those up markets.
Downside capture · Benchmark · Performance attribution · Alpha · Beta