Optimizing Value
研究比较了账面市值比和盈利市值比两种价值指标的历史表现，发现混合策略优于单一指标，且优化策略在跟踪误差、换手率和信息比率上优于传统排序策略。
In a series of empirical studies, the authors investigated the performance of two popular value metrics: book-toprice (B/P) ratio and earnings-to-price (E/P) ratio. In an academic study based on data from Ken French’s website, they found that, though strategies based on E/P ratio had higher return and lower risk than strategies based on B/P ratio between 1951 and 2013, B/P ratio outperformed E/P ratio between 1963 and 1990, which was the basis of the landmark study establishing B/P ratio as the academic standard. In a practitioner-oriented study that accounted for liquidity and transaction costs, strategies based on a blend of B/P and E/P ratios outperformed both single-metric strategies during most 10-year periods between 1973 and 2013. Optimized value strategies had lower tracking error, lower turnover, and a higher information ratio than rankand-chop strategies, which weight high-percentile value stocks by capitalization. Sector constraints raised both the Sharpe ratio and the information ratio of an optimized blended-value strategy. <b>TOPICS:</b>VAR and use of alternative risk measures of trading risk, statistical methods