Information Ratio
The information ratio measures a portfolio's excess return over a benchmark per unit of tracking error, gauging how consistently a manager beats that benchmark.
The information ratio (IR) divides a portfolio's active return by its tracking error. Active return is the average difference between the portfolio's return and its benchmark's return over the same periods; tracking error is the standard deviation of that difference. In words, the numerator captures how much you outperformed the benchmark, and the denominator captures how erratic that outperformance was. A higher IR means you are beating the benchmark more reliably rather than through a few lucky periods.
The information ratio is closely related to the Sharpe ratio, but the reference point differs. Sharpe measures excess return over the risk-free rate divided by total volatility, treating cash as the baseline. The information ratio measures excess return over a chosen benchmark (such as the S&P 500 or a sector index) divided by the volatility of that excess return, making it the natural metric for judging an active strategy that is supposed to add value on top of a passive index.
For investors, the IR answers a sharper question than raw return alone: is the manager generating genuine, repeatable skill (alpha), or just taking more benchmark-like risk? An IR around 0.5 is respectable, and sustained values near 1.0 are excellent and rare. Because it normalizes by tracking error, it lets you compare strategies with very different aggressiveness on a level footing, and it penalizes outperformance that comes with wild swings relative to the benchmark.
hedgewing.ai computes benchmark-relative statistics like the information ratio inside its nightly walk-forward backtesting, where the four-model ensemble (LSTM, GRU, TCN, Transformer) is evaluated strictly on out-of-sample periods. Measuring active return against a benchmark out-of-sample, rather than over an in-sample fit, is what separates a real edge from a curve-fit one, and it sits alongside the platform's other risk analytics such as the Sharpe and Sortino ratios.
Related terms
Sharpe Ratio · Alpha · Walk-Forward Backtesting
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