进行缩微处理后的Z-Score非常简介好用，时间复杂度也并不高在step3还是秒出不影响过程，但是会对因子构建有更多要求。 最终选择哪种方法，需要通过历史回测来验证哪种方法在你的特定因子组合和选股策略上表现更好、更稳定。 没有绝对最优，只有更合适。

Z-score is an extremely useful technique not only for screening, but also for stock picking and portfolio structuring. A backtest shows that using a composite Z-score, based on PC, PTBV and PE ratios, ...

Thomas J. Brock is a CFA and CPA with more than 20 years of experience in various areas including investing, insurance portfolio management, finance and accounting, personal investment and financial ...