Role of Speculative Short Sales in Price Formation: The Case of the Weekend Effect

Honghui Chen and Vijay Singal

Journal of Finance, 2003, vol. 58, issue 2, 685-705

Abstract: We argue that short sellers affect prices in a significant and systematic manner. In particular, we contend that speculative short sales contribute to the weekend effect: The inability to trade over the weekend is likely to cause these short sellers to close their speculative positions on Fridays and reestablish new short positions on Mondays causing stock prices to rise on Fridays and fall on Mondays. We find evidence in support of this hypothesis based on a comparison of high short‐interest stocks and low short‐interest stocks, stocks with and without actively traded options, IPOs, zero short‐interest stocks, and highly volatile stocks.

Date: 2003
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Persistent link: https://EconPapers.repec.org/RePEc:bla:jfinan:v:58:y:2003:i:2:p:685-705

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