October Term 2010 · Docket 09-1403

Can defendants prove no price impact before class certification?

Investors seek class status. The company argues individual reliance issues block certification.

Official caption
Erica P. John Fund, Inc. v. Halliburton Co.
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Official Transcript

Verified source milestones

  1. — An official oral-argument transcript was verified.

The arguments, in order

This case may have been argued more than once. Each entry below uses that session's official transcript. Later arguments do not erase earlier ones.

  1. Argument 1 ·

    What happened at the argument

    Mr. Boies argued the district court found Rule 23(a) requirements met. He stated the plaintiff fulfilled all certification requirements.

    Mr. Sterling argued individual reliance issues predominate. He cited Basic to support this view.

    Justice Ginsburg asked how the class would prove loss causation. She noted this issue usually arises at trial.

    Read the official transcript for this argument · Official argument details

    Sources used for this argument breakdown

A citizen's guide to the whole case

What this case is about

This case tests when courts must resolve reliance and price impact. the side that brought the case wants class certification. the opposing side wants to defeat it early.

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How the case got here

The Supreme Court heard oral argument in this case on April 25, 2011.

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What each side wants

the side that brought the case wants the court to certify the class. It argues reliance is presumed for all members.

the opposing side wants the court to deny certification. It argues individual reliance issues predominate.

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What each side says

the side that brought the case argues the Basic presumption applies at certification. It claims loss causation belongs at trial.

the opposing side argues individual reliance issues predominate. It claims price impact must be resolved first.

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What the justices asked

Justice Alito asked if the Basic presumption can be rebutted at certification.

Justice Kagan asked if materiality can be rebutted at certification. She also asked why price impact differs from other disputes.

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Why it matters

This dispute defines the scope of securities class actions. It determines whether courts resolve reliance issues early. It affects the cost and speed of investor litigation.

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What happens next

This article currently covers the argument record. Use the official docket link for later case activity.

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Official Court provenance

Official docket and case history · Official Supreme Court oral-argument detail page

Title and summary sources

Revision history

  1. Revision 1 · Official Transcript ·

    Correction: Rewritten to the concise citizen-facing editorial standard.

  2. Revision 2 · Official Transcript ·

    Correction: Migrated to the dated official Court activity contract without model use.

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