Shackling Short Sellers: The 2008 Shorting Ban
Singapore Management University - Lee Kong Chian School of Business
Charles M. Jones
Columbia Business School - Finance and Economics
Purdue University - Krannert School of Management
October 30, 2012
In September 2008, the U.S. Securities and Exchange Commission (SEC) temporarily banned most short sales in nearly 1,000 financial stocks. We examine the ban’s effect on market quality, shorting activity, the aggressiveness of short sellers, and stock prices. The ban’s effects are concentrated in larger stocks; there is little effect on firms in the lower half of the size distribution. Although shorting activity drops by about 77% in large-cap stocks, stock prices appear unaffected by the ban. All but the smallest quartile of firms subject to the ban suffer a severe degradation in market quality, as measured by quoted spreads, effective spreads, and volatility.
Number of Pages in PDF File: 55
Keywords: short selling, financial crisis, Section 12(k)(2)
JEL Classification: G14working papers series
Date posted: June 2, 2009 ; Last revised: November 1, 2012
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