521 U.S. 591 (1997) Cited 6,955 times 69 Legal Analyses
Holding that courts are "bound to enforce" Rule 23's certification requirements, even where it means decertifying a class after they had reached a settlement agreement and submitted it to the court for approval
544 U.S. 336 (2005) Cited 3,550 times 67 Legal Analyses
Holding that the securities statutes have a private of action “not to provide investors with broad insurance against market losses, but to protect them against those economic losses that misrepresentations actually cause”
Holding that an interlocutory order denying a motion for class certification merges into a final judgment resulting from the class representative's failure to prosecute its individual claims
Concluding that price recovery after the class period “does not negate the inference that [plaintiff] has suffered economic loss” because the price rebound could be explained by external events
Fed. R. Civ. P. 23 Cited 34,939 times 1235 Legal Analyses
Holding that, to certify a class, the court must find that "questions of law or fact common to class members predominate over any questions affecting only individual members"
15 U.S.C. § 78j Cited 12,506 times 165 Legal Analyses
Granting SEC power to establish rules to further statute forbidding manipulative or deceptive devices in connection with purchase or sale of securities
15 U.S.C. § 78t Cited 3,983 times 20 Legal Analyses
Holding liable any person "who, directly or indirectly, controls any person liable under any provision of this chapter or of any rule or regulation thereunder"