Stock fraud class actions
Halliburton v. Erica P. John Fund
In brief
The Court kept the investors’ reliance rule, let Halliburton challenge it with stock-price evidence before group-suit approval, and sent the case back after wiping out the Fifth Circuit ruling.
- Where it stands
- Decided
Decided 9-0 · June 23, 2014 · Opinion by Justice Ginsburg
- What it’s about
- Former Halliburton shareholders sought class-action status in a securities-fraud suit using a rule that presumes investors relied on public misstatements reflected in an efficient market’s stock price.
- Who it affects
- Securities-fraud defendants, including Halliburton, may offer evidence that alleged misstatements did not affect a stock’s price before a court decides whether investors can sue as a group.
Summary: written with AI from the case record.
What it's about
The Court kept that rule but allowed Halliburton to offer evidence before class certification that the alleged misstatements did not affect the stock price; it wiped out the Fifth Circuit ruling (vacated it) and sent the case back (remanded it).
An earlier Supreme Court rule lets investors avoid proving one by one that they relied on public statements when they buy stock in a market that quickly reflects public information.
Question presented
May Halliburton challenge the class certification of its former shareholders by introducing evidence that the alleged fraud did not impact the price of the stock?
What the Court decided
Holding
Halliburton has not shown a “special justification,” Dickerson v. United States, 530 U. S. 428, 443, for overruling Basic’s presumption of reliance. The Court agrees with Halliburton, however, that defendants must be afforded an opportunity to rebut the presumption of reliance before class certification with evidence of a lack of price impact. Defendants may already introduce such evidence at the merits stage to rebut the Basic presumption, as well as at the class certification stage to counter a plaintiff’s showing of market efficiency. Forbidding defendants to rely on the same evidence prior to class certification for the particular purpose of rebutting the presumption altogether makes no sense, and can readily lead to results that are inconsistent with Basic’s own logic. 718 F. 3d 423, vacated and remanded.
- Result
- Vacated
The Court's reasoning
The Court said Halliburton gave no special reason to end the earlier rule. It said defendants may use evidence about whether statements moved stock prices later and to challenge whether a market reflected public information, so they should also be able to use it before group-suit approval.
The vote
- Joined the judgment
- Concurred in a separate opinion
- Wrote an opinion
- Majority · 6joined the Court's opinion
What's next
The case returns to the Fifth Circuit for further proceedings under the Supreme Court’s ruling.
Documents
Opinions
Docket activity
New analysis added
AI analysis generated: Case Briefing
AI analysis generated: Decision Record
Case data updated: summary, question_presented, generation_metadata
Case data updated: question_presented, extraction_metadata
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Opinion added: Opinion
More questions
- Did the Court decide whether Halliburton committed fraud?
- No. The Court addressed what evidence Halliburton could offer before group-suit approval, not whether the alleged fraud occurred.
Sources
Primary materials plus reporting. Best-effort analysis: this explainer relies on a mix of primary materials and trusted secondary sources. Official filings and opinions remain authoritative.