United States: U.S. Supreme Court Distinguishes Half-Truths From Pure Omissions And Holds That Pure Omissions Are Not Actionable Under Rule 10b–5(b) - Mayer Brown

Answering a precise question increasingly raised by securities fraud plaintiffs, the United States Supreme Court held in Macquarie Infrastructure Corp. v. Moab Partners that a failure to disclose information cannot support a private action under Rule 10b–5(b).