The Information Content of Operational Effectiveness
研究企业运营效率（以现金转换周期衡量）是否对投资者有信息含量，发现其与盈余公告时的异常回报和交易量正相关，并能预测未来盈利和现金流，但会加剧坏消息后的漂移。
ABSTRACT We address whether and why a firm's operational effectiveness, , has information content for investors and what role that information plays in the price discovery process at quarterly earnings announcements. We measure using the cash conversion cycle (CCC) multiplied by −1, such that higher reflects better operational effectiveness. Higher is associated with higher abnormal stock returns and trading volume at earnings announcements and with higher future earnings and cash flows, which helps explain the positive return and volume relations. Higher also is associated with larger post‐earnings‐announcement drift and less timely incorporation of information in earnings announcements into stock prices. However, this relation largely is attributable to firms that announce bad earnings news. Together, we infer that operational effectiveness is informative to investors because it comprises forward‐looking information about earnings and cash flows and that announcements of improvements in along with bad earnings news impede the price discovery process.