Law Commons^™

Thinking Fast And Slow About The Concept Of Materiality, Mark J. Loewenstein

Publications

Determining whether, for securities law purposes, a misrepresentation or omission is material raises interesting questions. The Court of Appeals in SEC v. Texas Gulf Sulphur Co. provided some guidance on materiality, and the U.S. Supreme Court has weighed in several times in the past 50 years. This article first discusses what Texas Gulf Sulphur contributed to the doctrine of materiality, then briefly considers other dimensions of the doctrine, and finally moves to its thesis: The doctrine of materiality should take into account important psychological insights and heuristics that may affect the way that a fact finder decides whether a misrepresentation …

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 …