Consumer Finance Monitor

What Are Class Action Waivers Worth? A New Study Looks to the Stock Market for Answers

Oct 8, 2026
James Fallows Tierney, a Chicago-Kent law professor and former SEC attorney, discusses his eight-year study of class action waivers and arbitration. He explains how stock-market event studies tracked 11 regulatory developments, measured investor reactions, and separated arbitration effects from broader CFPB news. The conversation explores what markets reveal, the study’s limitations, and future applications to consumer-finance policy.
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INSIGHT

CFPB Data Shows Class Actions’ Limited Consumer Payoff

  • CFPB data showed most studied class actions delivered no meaningful consumer benefit while imposing major industry costs.
  • Only 12.3% produced settlement benefits, averaging $32 per claimant, while the projected waiver ban could trigger $2.62–$5.23 billion in costs.
INSIGHT

Why Tierney Turned To Stock Markets

  • James Fallows Tierney designed the study to test who captures arbitration’s litigation-cost savings.
  • Stock prices offered a market-based way to measure whether investors believe enforceable waivers create value for firms.
INSIGHT

How Event Studies Isolate Arbitration Value

  • An event study isolates abnormal stock returns around public regulatory developments.
  • Comparing affected firms with similar unaffected financial firms helps remove broad market and sector movements.
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