The up and down capture is a measure of how well a manager was able to replicate or improve on phases of positive benchmark returns, and how badly the manager was affected by phases of negative benchmark returns.

To calculate the up capture, we first form new series from the manager and benchmark series by dropping all time periods where the benchmark return is zero or negative. The up capture is then the quotient of the annualized return of the resulting manager series, divided by the annualized return of the resulting benchmark series. The down capture is calculated analogously.

UpCapture =

where

    n_p = number of positive benchmark returns
    s_k = k-th positive benchmark return
    r_i = manager return for the same period as the i-th positive benchmark return
    y = number of years, counting periods of positive benchmark returns only

For the down capture, just use the non-positive returns instead of the positive ones.

To view our quick tip video on Up and Down Capture, click the following link:  http://www.styleadvisor.com/sites/default/files/quick_tip_video/updown_c...