THE EFFECT OF TRADING VOLUMES ON STOCK RETURNS FOLLOWING LARGE PRICE MOVES
Economic Annals, 2019, vol. 64, issue 220, 85 - 116
The study analyses the cor-relation between abnormal trading vol-umes accompanying large stock price changes and subsequent stock price dy-namics. Assuming that abnormal trading volume associated with a large price move may serve as an indication of the extent of the immediate stock price reaction to the underlying company-specific shock, I sug-gest that large price moves accompanied by relatively high (low) abnormal trading volumes may be followed by price reversals (drifts). Analysing a large sample of major daily stock price moves and defining the latter according to a number of alterna-tive proxies, I document that both large price increases and decreases accompanied by high (low) abnormal trading volumes are followed by significant price reversals (drifts) on each of the next two trading days and over five- and twenty-day intervals following the initial price move, the mag-nitude of the reversals (drifts) increasing over longer post-event windows. The effect remains significant after accounting for additional company-specific (size, CAPM beta, historical volatility) and event-specif-ic (stock’s absolute return on the event day) factors, and is robust to different methods of calculating abnormal returns and to dif-ferent sample filtering criteria.
Keywords: Abnormal Trading Vol-umes; Behavioural Finance; Large Price Changes; Stock Price Drifts; Stock Price Reversals. (search for similar items in EconPapers)
JEL-codes: G11 G14 G19 (search for similar items in EconPapers)
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