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Sharpe Ratio
Risk Management
Что это значит
A number that measures return earned per unit of risk taken. Above 1 is good, above 2 is excellent, and below 0 means you are losing money.
Пример
A strategy returning 20% a year with 10% annual volatility has a Sharpe of about 2.0 (after adjusting for the risk-free rate). Another returning 20% with 30% volatility has a Sharpe of about 0.67 -- worse risk-adjusted.
Ошибка новичков
Beginners compare strategies by raw return only. A 30% return with a 0.4 Sharpe is far worse than a 20% return with a 1.8 Sharpe -- the first is taking dangerous risk for the same dollars.
Связанные термины
- Expectancy — The average amount you expect to make per trade, accounting for both wins and losses. A po…
- Volatility — How much and how fast an asset price swings. High volatility means large price moves in sh…