Securities fraud-on-the-market presumption and certification — Basic presumption remains, subject to rebuttal evidence at certification
Civil Procedure — FRCP 23 class actions
Representative/statistical evidence may support (b)(3) predominance where appropriate under governing substantive law
To establish (b)(3) predominance, damages methodology must measure damages attributable to the certified theory of liability
Strict limits on limited-fund mandatory classes under Rule 23(b)(1)(B)
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