Information Ratio Calculator

The calculation process takes place in two straightforward steps. First, the total portfolio return is determined using the beginning and ending portfolio values: Portfolio Return = (Ending Portfolio - Beginning Portfolio) / Beginning Portfolio. Second, the information ratio is computed by subtracting the benchmark return from the portfolio return to find the excess return, which is then divided by the tracking error. Expressed mathematically, Information Ratio = (Portfolio Return - Benchmark Return) / Tracking Error. A higher ratio signifies superior consistency in outperforming the market index.

Imagine you invest in an actively managed equity fund. You start the year with a Beginning Portfolio value of $100,000, and it grows to an Ending Portfolio value of $115,000 by year-end. First, calculate the portfolio return: ($115,000 - $100,000) / $100,000 = 0.15, or 15%. Next, assume the benchmark index returned 10% over the same period, yielding an excess return of 5% (15% - 10%). If the tracking error—representing the standard deviation of these excess returns—is calculated at 4%, or 0.04, the final information ratio is computed as 0.05 / 0.04 = 1.25. An information ratio of 1.25 indicates that the manager successfully generated meaningful outperformance per unit of active risk taken.

Always ensure your portfolio return and benchmark return cover the exact same time horizon to maintain analytical accuracy. Pay close attention to tracking error; a high tracking error means the portfolio's returns deviate significantly from the benchmark, which requires a proportionally higher excess return to justify the strategy. Finally, use the information ratio alongside other risk-adjusted metrics like the Sharpe ratio to gain a comprehensive view of overall portfolio health.