Law Commons^™

Power And Statistical Significance In Securities Fraud Litigation, Jill E. Fisch, Jonah B. Gelbach

All Faculty Scholarship

Event studies, a half-century-old approach to measuring the effect of events on stock prices, are now ubiquitous in securities fraud litigation. In determining whether the event study demonstrates a price effect, expert witnesses typically base their conclusion on whether the results are statistically significant at the 95% confidence level, a threshold that is drawn from the academic literature. As a positive matter, this represents a disconnect with legal standards of proof. As a normative matter, it may reduce enforcement of fraud claims because litigation event studies typically involve quite low statistical power even for large-scale frauds.

This paper, written for …

The Myth Of Morrison: Securities Fraud Litigation Against Foreign Issuers, Robert Bartlett, Matthew D. Cain, Jill E. Fisch, Steven Davidoff Solomon

All Faculty Scholarship

Using a sample of 388 securities fraud lawsuits filed between 2002 and 2017 against foreign issuers, we examine the effect of the Supreme Court's decision in Morrison v. National Australia Bank Ltd. We find that the description of Morrison as a steamroller, substantially ending litigation against foreign issuers, is a myth. Instead, we find that Morrison did not significantly change the type of litigation brought against foreign issuers, which, both before and after this case, focused on foreign issuers with a U.S. listing and substantial U.S. trading volume. Although dismissal rates rose post-Morrison, we find no evidence …

Class Actions, Statutes Of Limitations And Repose, And Federal Common Law, Stephen B. Burbank, Tobias Barrington Wolff

All Faculty Scholarship

After more than three decades during which it gave the issue scant attention, the Supreme Court has again made the American Pipe doctrine an active part of its docket. American Pipe addresses the tolling of statutes of limitations in federal class action litigation. When plaintiffs file a putative class action in federal court and class certification is denied, absent members of the putative class may wish to pursue their claims in some kind of further proceeding. If the statute of limitations would otherwise have expired while the class certification issue was being resolved, these claimants may need the benefit of …

The Logic And Limits Of Event Studies In Securities Fraud Litigation, Jill E. Fisch, Jonah B. Gelbach, Jonathan Klick

All Faculty Scholarship

Event studies have become increasingly important in securities fraud litigation after the Supreme Court’s decision in Halliburton II. Litigants have used event study methodology, which empirically analyzes the relationship between the disclosure of corporate information and the issuer’s stock price, to provide evidence in the evaluation of key elements of federal securities fraud, including materiality, reliance, causation, and damages. As the use of event studies grows and they increasingly serve a gatekeeping function in determining whether litigation will proceed beyond a preliminary stage, it will be critical for courts to use them correctly.

This Article explores an array of …

American Pipe Tolling, Statutes Of Repose, And Protective Filings: An Empirical Study, David Freeman Engstrom, Jonah B. Gelbach

All Faculty Scholarship

This paper offers a conceptual and empirical analysis of a key issue that overhangs CalPERS v. ANZ Securities, soon to be decided by the Supreme Court. In particular, the paper offers an empirical estimate of the plausible quantity of wasteful protective filings that putative class members might make if the Court were to hold that American Pipe tolling does not apply to statutes of repose in the federal securities laws.