波動率是回報率的標準差，用以衡量回報偏離平均或預期回報的程度。
Volatility is the standard deviation of returns, measuring their dispersion around the average or expected return.
波動率是回報率的標準差，用以衡量回報偏離平均或預期回報的程度。
Volatility is the standard deviation of returns, measuring their dispersion around the average or expected return.