Existing literature documents that cross-sectional stock returns exhibit both price momentum and earnings momentum. In this paper, we examine whether commonly used style and sector indexes also have momentum patterns. We show that style indexes exhibit strong price momentum, but little evidence...

Holding earnings surprise constant, investors react negatively to late earnings announcements. One standard deviation of announcement delay (about 5 days) corresponds to 23 bps lower abnormal returns over a two-day announcement window. We show that the results are robust to further controlling...