Unverified50% confidenceFactExact time
The expected value formula is: Expected Value = (Win Rate × Average Profit) − (Loss Rate × Average Loss).
1
Sources
50%
Confidence
Long-term
Relevance
10/5/2026
First Seen
Sources
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Related Claims
Unverified期望价值的计算方式为各种可能结果的收益乘以其发生概率之和75% similarUnverifiedSubstituting the strategy's data (55% × 2.4R − 45% × 1R) yields an expected value of +0.87R, meaning a long-term average net gain of 0.87 units for every 1 unit of risk taken.68% similarUnverifiedThe Sharpe ratio is excess return divided by the standard deviation of returns, measuring the reward obtained per unit of risk taken; a value above 1 is generally considered good performance, while above 2 is considered excellent.64% similarUnverifiedThe expected cost of a decision depends not only on the probability that the model makes an incorrect judgment, but also on the actual consequences when an error occurs.63% similarUnverifiedPopulation risk refers to the expected loss of a model over the entire data-generating distribution, while empirical risk is the average loss computed over a finite training sample.62% similar
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