Do not subtract risk_free_ratio twice
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@ -53,7 +53,7 @@ class SortinoHyperOptLossDaily(IHyperOptLoss):
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sum_daily['downside_returns'] = 0
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sum_daily.loc[total_profit < 0,
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'downside_returns'] = sum_daily['profit_percent_after_slippage']
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total_downside = sum_daily['downside_returns'] - risk_free_rate
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total_downside = sum_daily['downside_returns']
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down_stdev = total_downside.std()
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if (down_stdev != 0.):
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