The US Supreme Court holds that proof of materiality is not a prerequisite to certification of a securities-fraud class action (Amgen/Connecticut Retirement Plans & Trust Funds)

This case is not an antitrust case, nonetheless it has enormous precedential importance to class certifications in antitrust cases. Plaintiff securities purchasers brought suit under the federal securities laws, relying in order to establish common impact under Rule 23 on the “fraud-on-the-market” presumption, the premise of which is that the

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Douglas Richards, Christopher J. Cormier, The US Supreme Court holds that proof of materiality is not a prerequisite to certification of a securities-fraud class action (Amgen/Connecticut Retirement Plans & Trust Funds), 27 February 2013, e-Competitions Bulletin US Private Enforcement, Art. N° 54837

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