573 U.S. 258 (2014)
Between June 3, 1999, and December 7, 2001, Halliburton Company and one of its executives made a series of public statements about the company's potential liability in asbestos litigation, its expected revenue from construction contracts, and the anticipated benefits of a merger with another company.1
Respondent Erica P. John Fund, Inc., serving as lead plaintiff, alleged that these statements were materially false and misleading and were made to inflate the price of Halliburton's common stock.2 Halliburton later issued corrective disclosures that EPJ Fund contends caused the stock price to drop and produced losses for investors who had purchased shares during the class period.3
EPJ Fund moved in the United States District Court for the Northern District of Texas to certify a class of all investors who purchased Halliburton common stock during the class period.4 The district court determined that the proposed class satisfied the four threshold requirements of Federal Rule of Civil Procedure 23(a).5 It nevertheless denied certification under Rule 23(b)(3) because Fifth Circuit precedent at the time required securities fraud plaintiffs to prove loss causation at the class certification stage to rely on the presumption from Basic Inc. v. Levinson.6
The Fifth Circuit affirmed the denial of class certification on the same ground.7 The Supreme Court granted certiorari, vacated the judgment of the Fifth Circuit in Erica P. John Fund, Inc. v. Halliburton Co., 563 U.S. 804 (2011), and remanded the case.8 On remand, Halliburton presented evidence that none of its alleged misrepresentations had actually affected the company's stock price and argued that this evidence rebutted the Basic presumption, so that individual issues of reliance would predominate.9
The district court declined to consider the price impact evidence at the certification stage and certified the class under Rule 23(b)(3).10 The Fifth Circuit affirmed the certification order.11 It acknowledged that Halliburton's price impact evidence could be used at trial on the merits but held that such evidence could not be considered at the class certification stage to rebut the presumption of reliance.12 The Supreme Court granted certiorari a second time to address whether Basic's presumption should be overruled or modified and whether defendants may present evidence of no price impact before class certification.13
Whether the presumption of reliance recognized in Basic Inc. v. Levinson should be overruled?14
A party seeking to overrule precedent must show a special justification beyond mere disagreement with the prior decision.15 Basic's rebuttable presumption of reliance rests on the modest premise that market professionals generally consider public material statements.16 The presumption is consistent with the Exchange Act, subsequent decisions limiting the Rule 10b-5 action, and Rule 23 predominance requirements.17
No. Halliburton contended that the presumption conflicts with congressional intent reflected in section 18(a) of the 1934 Exchange Act and rests on economic premises undermined by evidence that markets do not always incorporate information efficiently.18 Yet the Court found these arguments identical to those rejected in Basic itself and identified no fundamental shift in theory or law.19 The established facts show that EPJ Fund alleged a series of public misrepresentations by Halliburton between June 3, 1999, and December 7, 2001, followed by corrective disclosures that allegedly caused stock price drops.20
EPJ Fund sought class certification after the remand in Halliburton I without needing to prove loss causation at that stage.21 Halliburton's price-impact evidence addressed rebuttal rather than any basis for discarding the presumption entirely.22
The Basic presumption of reliance should not be overruled.23
Related opinions on this issue
Joined by Scalia And Alito, Jj.
Justice Thomas, concurring in the judgment, maintained that Basic should be overruled.24 He argued that the implied Rule 10b-5 private cause of action is a judicial construct that courts should not expand through policy-driven presumptions based on nascent economic theory.25 Basic relied on flawed intuitions about investor behavior, assuming all investors rely on the integrity of market prices when many trade to exploit perceived mispricings, address liquidity needs, or pursue other strategies unrelated to price accuracy.26
The resulting presumption has become virtually irrebuttable in class-action practice because individualized rebuttals are impractical both before and after certification due to procedural dynamics and settlement pressures.27 This effectively eliminates the reliance element that is essential to ensure plaintiffs were actually defrauded rather than merely suffering economic losses from a misstatement.28
Whether plaintiffs must prove that a defendant's misrepresentation had a price impact to invoke the Basic presumption at the class certification stage?29
The Basic presumption incorporates two constituent presumptions.30 One provides that a public material misrepresentation affected the stock price when the market is efficient.31 A second provides that a plaintiff who bought at the market price relied on the integrity of that price.32 Requiring direct proof of price impact would eliminate the first presumption and alter the prerequisites for class certification.33
No. EPJ Fund satisfied the established prerequisites by showing that Halliburton's misrepresentations were public and material.34 The Court held that these showings suffice to invoke the presumption without direct evidence of price impact at certification.35
The established facts confirm that after remand Halliburton offered evidence originally introduced to disprove loss causation as proof of no price impact.36 The Fifth Circuit and district court correctly treated that evidence as relevant only to rebuttal or merits rather than an additional plaintiff burden at the certification stage.37
Plaintiffs need not prove price impact directly to invoke the Basic presumption at the class certification stage.38
Whether defendants may introduce evidence that a misrepresentation had no price impact to rebut the Basic presumption at the class certification stage?39
Because price impact is Basic's fundamental premise and directly affects the predominance inquiry under Rule 23(b)(3), defendants must be permitted to introduce evidence of no price impact at the class certification stage to rebut the presumption.40 They may do so just as they may at trial or to challenge market efficiency.41
Yes. Halliburton preserved and presented evidence that its alleged misrepresentations produced no statistically significant price movement on the dates they were made.42 The Court held that excluding this evidence from the certification stage would produce results inconsistent with Basic's own logic that an indirect showing via market efficiency should not preclude direct rebuttal.43 The established facts establish that the district court refused to consider the evidence at certification and the Fifth Circuit affirmed on the ground that price impact bears only on the merits.44
The Supreme Court vacated the judgment of the Court of Appeals for the Fifth Circuit and remanded the case for further proceedings consistent with this opinion.45
Defendants may introduce evidence of no price impact to rebut the Basic presumption at the class certification stage.46
Related opinions on this issue
Joined by Breyer And Sotomayor, Jj.
Justice Ginsburg observed that advancing price-impact consideration from the merits stage to the certification stage may broaden the scope of discovery available at certification.47 She noted that the Court recognizes it is incumbent upon the defendant to show the absence of price impact.48 On that understanding, the Court's judgment should impose no heavy toll on securities-fraud plaintiffs with tenable claims, preserving access to class treatment where the evidence supports it.49
The concurrence underscores that defendants bear the burden of rebuttal and that any expanded discovery will not unduly hinder viable claims.50
Joined by Scalia And Alito, Jj.
Justice Thomas noted that even after today's clarification the presumption remains largely irrebuttable in practice because individualized rebuttal is rarely feasible before or after certification due to class-action dynamics and settlement pressures.51 This leaves the reliance element effectively eliminated for class actions, as defendants can seldom challenge each plaintiff's actual reliance on price integrity in a meaningful way.52 He maintained that the practical effect continues to undermine the essential reliance requirement despite the majority's procedural adjustment.53