Information Ratio

The Information Ratio of a manager series vs. a benchmark series is the quotient of the annualized excess return and the annualized standard deviation of excess return.

    Information Ratio = (AnnRtn(r1, ..., rn) - AnnRtn(s1, ..., sn)) / AnnStdDev(e1, ..., en)


    r1, ..., rn = manager return series
    s1, ..., sn = benchmark return series
    e1, ..., en = r1 - s1, ..., rn - sn

The Information Ratio measures the consistency with which a manager beats a benchmark.

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