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Columbia Law School

Securities Law

2020

Finance

Articles 1 - 2 of 2

Full-Text Articles in Law

Petition For Rulemaking On Short And Distort, John C. Coffee Jr., Joshua Mitts, James D. Cox, Peter Molk, Edward Greene, Randall S. Thomas, Meyer-Eisenberg, Robert B. Thompson, Colleen Honigsberg, Andrew Verstein, Donald C. Langevoort, Charles K. Whitehead Jan 2020

Petition For Rulemaking On Short And Distort, John C. Coffee Jr., Joshua Mitts, James D. Cox, Peter Molk, Edward Greene, Randall S. Thomas, Meyer-Eisenberg, Robert B. Thompson, Colleen Honigsberg, Andrew Verstein, Donald C. Langevoort, Charles K. Whitehead

Faculty Scholarship

Today, some hedge funds attack public companies for the sole purpose of inducing a short-lived panic which they can exploit for profit. This sort of market manipulation harms average investors who entrust financial markets with their retirement savings. While short selling serves a critical function in the capital markets, some short sellers disseminate negative opinion about a company, inducing a panic and sharp decline in the stock price, and rapidly close that position for a profit prior to the price partially or fully rebounding. We urge the SEC to enact two rules which will discourage manipulative short selling. The petition …


Short And Distort, Joshua Mitts Jan 2020

Short And Distort, Joshua Mitts

Faculty Scholarship

Pseudonymous attacks on public companies are followed by stock price declines and sharp reversals. These patterns are likely driven by manipulative stock options trading by pseudonymous authors. Among 1,720 pseudonymous attacks on mid- and large-cap firms from 2010 to 2017, I identify over $20.1 billion in mispricing. Reputation theory suggests these reversals persist because pseudonymity allows manipulators to switch identities without accountability.