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Six things that moved US market structure, 20–26 Sep 2026

Week: 20–26 Sep 2026 · ·0:59

The weekly roundup, in about a minute, of US equity market structure and prediction markets for 20–26 Sep 2026: Sixth Circuit rules against Kalshi; New York sues Polymarket US; CFTC staff warn on mention markets; First tokenised stock venue notice; SEC fines OTC Link $575,000; FINRA best-ex consultation closes.

In this episode

  1. Sixth Circuit rules against Kalshi
  2. New York sues Polymarket US
  3. CFTC staff warn on mention markets
  4. First tokenised stock venue notice
  5. SEC fines OTC Link $575,000
  6. FINRA best-ex consultation closes

Sources

  1. opn.ca6.uscourts.gov opn.ca6.uscourts.gov/opinions.pdf/26a0272p-06.pdf
  2. supremecourt.gov supremecourt.gov/docket/docketfiles/html/public/26-299.html
  3. ag.ny.gov ag.ny.gov/press-release/2026/attorney-general-james-and-governor-hochul-announce-lawsuit-a
  4. storage.courtlistener.com storage.courtlistener.com/recap/gov.uscourts.nysd.673553/gov.uscourts.nysd.673553.1.0.pdf
  5. cftc.gov cftc.gov/csl/26-27/download
  6. cftc.gov cftc.gov/PressRoom/PressReleases/9302-26
  7. tokenizedstockvenue.com tokenizedstockvenue.com/notice-1.0.html
  8. govinfo.gov govinfo.gov/content/pkg/FR-2026-09-22/html/2026-19388.htm
  9. sec.gov sec.gov/newsroom/press-releases/2026-91-sec-censures-otc-link-llc-repeated-compliance-fail
  10. finra.org finra.org/rules-guidance/notices/26-15
  11. sec.gov sec.gov/rules-regulations/2026/06/s7-2026-20

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