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Price Shocks, News Disclosures, And Asymmetric Drifts, Hai Lu, Kevin Wang, Xiaolu Wang

Research Collection School Of Accountancy

Motivated by investor disagreement and corporate disclosure literatures, we examinehow stock price shocks affect future stock returns. We find that both large short-termprice drops and hikes are followed by negative abnormal returns over the subsequent year,consistent with the conjecture that price shocks are useful indicators of inter-temporalspikes in investor disagreement and investor opinion converges gradually. The asymmetricdrifts, return continuation for negative price shocks versus return reversal for positive ones,are in sharp contrast to the general findings of symmetric drifts in corporate event studies.Moreover, price shocks associated with public news events are followed by significantlyweaker downward drifts, suggesting that news disclosures …