On Friday, March 9, Atlantic Trading USA LLC (Atlantic) filed a class action complaint in Chicago federal court against numerous unnamed trading firms, alleging manipulation of the Chicago Board Options Volatility Index (VIX). Atlantic alleges that, from 2011 to the present, trading firms have manipulated the VIX settlement price by placing aggressive buy orders during the HOSS auction and then taking advantage of the artificially high VIX settlement price to cash out of expiring long VIX derivatives at a profit. Atlantic claims to represent a nationwide class of investors that has traded VIX futures or options since 2011 and seeks damages “in the hundreds of millions of dollars.” The case is captioned Atlantic Trading USA LLC. V. John Does 1-100, 18-cv-01754 (N.D.Ill.), and the complaint can be found here.
Similar class action complaints were recently filed in New York federal court, alleging collusive and manipulative VIX trading in violation of the Sherman and Clayton Acts, respectively. Those cases are captioned Samuel v. John Does 1-100, 18-cv-01593-AT (S.D.N.Y.) and David Quint v. DRW Holdings and John Does, 18-cv-01980-AT.
Plaintiffs in these cases are serving subpoenas on the Chicago Board Options Exchange and the Chicago Futures Exchange to obtain information sufficient to identify the firms involved in the trading activity at issue. We expect this process to take at least one month and, more likely, it will probably require several months. In the meantime, as a protective measure, trading firms should consider retaining, in addition to their routine account statements and order flow records, any other records reflecting HOSS order imbalances and the firm’s own objective risk and value assessments that formed the basis for their trading decisions during this time.
Steve Bedell, Katie Trkla, Tom Krebs, and Ellen Wheeler have represented numerous clients in numerous VIX-related regulatory proceedings and have defended regulators’ allegations of VIX manipulation arising from SPX order activity in the HOSS on VIX settlement day − an issue central to these lawsuits. For more about our team and our experience in this area, please contact us or visit Foley.com.
Similar class action complaints were recently filed in New York federal court, alleging collusive and manipulative VIX trading in violation of the Sherman and Clayton Acts, respectively. Those cases are captioned Samuel v. John Does 1-100, 18-cv-01593-AT (S.D.N.Y.) and David Quint v. DRW Holdings and John Does, 18-cv-01980-AT.
Plaintiffs in these cases are serving subpoenas on the Chicago Board Options Exchange and the Chicago Futures Exchange to obtain information sufficient to identify the firms involved in the trading activity at issue. We expect this process to take at least one month and, more likely, it will probably require several months. In the meantime, as a protective measure, trading firms should consider retaining, in addition to their routine account statements and order flow records, any other records reflecting HOSS order imbalances and the firm’s own objective risk and value assessments that formed the basis for their trading decisions during this time.
Steve Bedell, Katie Trkla, Tom Krebs, and Ellen Wheeler have represented numerous clients in numerous VIX-related regulatory proceedings and have defended regulators’ allegations of VIX manipulation arising from SPX order activity in the HOSS on VIX settlement day − an issue central to these lawsuits. For more about our team and our experience in this area, please contact us or visit Foley.com.
Author(s)
Related Insights
December 29, 2025
Tariff & International Trade Resource
Mexican January 2026 Tariff Tsunami: Maquilas Aren’t Immune
On January 1, 2026, Mexico will increase its general import tariff rate (known as the most favored nation (MFN) rate). The increase will be in the range of five to fifty percent, impacting 1,463 eight-digit tariff lines encompassing thousands of products originating in countries with which Mexico does not have a free trade agreement (FTA or the measure).
December 24, 2025
Health Care Law Today
Gender-Affirming Care: Multi‑State Lawsuit Challenges HHS Declaration
As previously discussed in Foley’s healthcarelawtoday, on December 18, 2025, the U.S. Department of Health & Human Services (HHS) held a press conference focused on what it defined as “sex rejection procedures” (SRPs), also known as gender-affirming care (GAC) for minors, and outlined next steps.
December 23, 2025
Energy Current
FERC Opens New Paths for Co-Located Loads in PJM: What Data Center and Power Generation Developers Need to Know
Key Takeaways FERC has ordered PJM to overhaul its tariff framework for co-located generation and large loads, finding existing rules…