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Abnormal Stock Returns, For The Event Firm And Its Rivals, Following The Event Firm's Large One-Day Stock Price Drop, Susana Yu, Dean Leistikow

Department of Accounting and Finance Faculty Scholarship and Creative Works

Purpose – The purpose of this paper is to examine intra-industry contagion and the following apparent violations of the efficient market hypothesis around large one-day price decline events in individual stocks. Design/methodology/approach – The paper examines daily stock returns around one-day price declines of 10 percent or more for event stocks and their rivals. Using techniques similar to those used in Bremer and Sweeney and Cox and Peterson, the paper includes event stocks whose prices are at least $10 per share prior to the event to reduce the possible price reversal induced by bid-ask price bounce. As is typical for …