Please include the sortino ration in the optimizer results page and the downloadable results Excel (xls) file.

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The Sortino ratio, a variation of the Sharpe ratio, differentiates harmful volatility from volatility in general by using a value for downside deviation.

The Sortino ratio is the excess return over the risk-free rate divided by the *downside* semi-variance, and so it measures the return to "bad" volatility. (Volatility caused by negative returns is considered bad or undesirable by an investor, while volatility caused by positive returns is good or acceptable.) In this way, the Sortino ratio can help an investor assess risk in a better manner than simply looking at excess returns to total volatility, as such a measure does not consider how often returns are positive as opposed to how often they're negative.
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Requested by: brunof
On date: 05/17/15
Category: Simulation