United States Supreme Court

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Matrixx Initiatives, Inc. v. Siracusano, 09–1156

In a securities fraud dispute involving the applicable standard for a claim under section10(b) and Rule 10b–5, appeals court judgment that district court erred in requiring an allegation of statistical significance to establish materiality is affirmed, where materiality means a substantial likelihood that the disclosure of the omitted fact would have been viewed by the reasonable investor as having significantly altered the total mix of information made available by the offeror.

Appellate Information

  • Argued 01/10/2011
  • Decided 03/22/2011
  • Published 03/22/2011




  • United States Supreme Court