如何计算Sharpe Ratio
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Sharpe Ratio measures risk-adjusted return: (portfolio return - risk-free rate) / volatility. Higher is better.
分步指南
- 1Input portfolio return, volatility, risk-free rate
- 2Calculate Sharpe ratio
- 3Compare across portfolios/investments
例题解析
输入
Portfolio 10% return, 15% volatility, 2% risk-free
结果
Sharpe = (10-2)/15 = 0.53 (decent)
> 1.0 excellent, < 0.5 poor
常见错误注意事项
- ✕Using different risk-free rates
- ✕Not comparing portfolios with same time period
常见问题
Is Sharpe ratio universal?
Useful but assumes normal distributions; doesn't capture tail risk well.
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