Retail Investors’ Contrarian Behavior Around News, Attention, and the Momentum Effect

Patrick Luo, Enrichetta Ravina, Marco C. Sammon and Luis Viceira

No 34086, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: Using a large and representative panel of U.S. brokerage accounts, we show that retail investors trade as contrarians after large earnings surprises, especially for loser stocks, and that such contrarian trading contributes to price momentum and post earnings announcement drift (PEAD). We show that extreme return streaks and surprises are not enough for stocks to exhibit PEAD and momentum and that the intensity of contrarian retail trading plays a key role: the PEAD of loser stocks with bad earnings surprises becomes increasingly more negative as retail buying pressure increases, and he PEAD of the stocks with the highest past returns and largest earnings surprises is the most positive for the stocks with the biggest net retail outflow. Finer sorts confirm the results, as do sorts by firm size and institutional ownership level. Younger and more attentive individuals are more likely to be contrarian, and a firm’s dividend yield, leverage, size, book to market, and analyst coverage are associated with the fraction of contrarian trades they face around earnings announcements. The disposition effect and stale limit orders, while present in our sample, do not explain our results. Our findings are consistent with investors’ conservatism, sticky beliefs, and cognitive uncertainty, as well as an incorrect belief in the Law of Small Numbers.

JEL-codes: G0 G11 G12 G4 G41 G5 (search for similar items in EconPapers)
Date: 2025-08
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Working Paper: Retail Investors’ Contrarian Behavior Around News, Attention, and the Momentum Effect (2023)
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