Halliburton Co. v. Erica P. John Fund, Inc.

Halliburton Co. v. Erica P. John Fund, Inc.
Supreme Court of the United States
Argued March 5, 2014 Decided June 23, 2014
Full case name	Halliburton Co., et al. v. Erica P. John Fund, Inc., fka Archdiocese of Milwaukee Supporting Fund, Inc.
Docket no.	13-317
Citations	573 U.S. 258 (more) 134 S. Ct. 2398; 189 L. Ed. 2d 339
Argument	Oral argument
Opinion announcement	Opinion announcement
Case history
Prior	Erica P. John Fund, Inc. v. Halliburton Co., 131 S. Ct. 2179, 563 U.S., 180 L. Ed. 2d 24 (2011).
Holding
Securities fraud defendants must be afforded an opportunity to rebut the presumption of reliance before class certification with evidence of a lack of price impact.
Court membership
Chief Justice John Roberts Associate Justices Antonin Scalia · Anthony Kennedy Clarence Thomas · Ruth Bader Ginsburg Stephen Breyer · Samuel Alito Sonia Sotomayor · Elena Kagan
Case opinions
Majority	Roberts, joined by Kennedy, Ginsburg, Breyer, Sotomayor, Kagan
Concurrence	Ginsburg, joined by Breyer, Sotomayor
Concurrence	Thomas (in judgment), joined by Scalia, Alito
Laws applied
Securities Exchange Act of 1934, Rule 10b-5

Halliburton Co. v. Erica P. John Fund, Inc., 573 U.S. 258 (2014), is a United States Supreme Court case regarding class action certification for a securities fraud claim. Under the fraud-on-the-market theory, the Court had to inquire as to if markets are economically efficient. The Court presumed they are.