The Case for Banning
Prediction Markets
Critics have real arguments. Here's what they are, why they resonate, and what defenders say.
This page takes the critic's perspective seriously — not to dismiss it, but because honest engagement with strong objections is more useful than cheerleading.
Five Bills in Congress. Two State Court Actions. This Is Not Fringe Opposition.
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STOP Corrupt Bets Act — Widest Scope Federal PM Ban Filed Today
Sen. Jeff Merkley (D-OR) and Rep. Jamie Raskin (D-MD-08) introduced the STOP Corrupt Bets Act on March 26, 2026 in a bicameral filing. The bill explicitly prohibits CFTC-registered entities from listing event contracts on: (1) elections and their outcomes; (2) government actions across all branches unless there is a commercial hedging need; (3) sports; and (4) U.S. or foreign military actions. The bill also clarifies that Congress never intended to legalize these markets under the Commodity Exchange Act and requires a GAO study on prediction market insider trading. Senate co-sponsors: Elizabeth Warren (D-MA), Richard Blumenthal (D-CT), Chris Van Hollen (D-MD), and Sheldon Whitehouse (D-RI). This is the broadest-scope PM restriction bill filed to date — broader than Schiff-Curtis (sports only) and Moore-Carbajal. Path to law uncertain: any legislation requires President Trump's signature, and CFTC Chair Selig has signaled support for prediction markets.
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End Prediction Market Corruption Act — Bars Officials from Trading
Sens. Jeff Merkley (D-OR) and Amy Klobuchar (D-MN) introduced the End Prediction Market Corruption Act on March 5, 2026. Co-sponsors: Chris Van Hollen (D-MD), Adam Schiff (D-CA), and Kirsten Gillibrand (D-NY). The bill bans the President, Vice President, and Members of Congress from trading any event contracts. Senior executive branch officials (as defined by financial disclosure rules) are prohibited from trading event contracts on matters in which they personally and substantially participate in their official capacity. Violations: $10,000 civil penalty per count; Attorney General may bring federal civil action. Disclosure: all covered officials must report event contract trades in annual financial disclosure filings. Unlike Schiff-Curtis/STOP Corrupt Bets (which ban contract types), this bill restricts WHO can trade. Committee referral: not yet assigned as of introduction date.
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House Companion Bill Filed: Event Contract Enforcement Act (Moore-Carbajal)
Reps. Blake Moore (R-UT) + Salud Carbajal (D-CA) introduced the Event Contract Enforcement Act on March 5, 2026 (per utahpolicy.com press release and Sports Betting Dime March 6 coverage) — a House companion to the Schiff-Curtis Senate sports ban. Critically, this bill goes further: it bans CFTC listings for sports, elections, government activity, terrorism, assassination, and war. State carve-out allows opt-outs for tribal compacts. Moore's sponsorship is significant — he is a known CFTC defender. Both chambers now have active bipartisan legislation targeting prediction markets.
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Arizona Criminal Prosecution: First State Criminal Charges Against Kalshi
Arizona Attorney General Kris Mayes filed 20 misdemeanor counts against KalshiEx LLC and Kalshi Trading LLC on March 17, 2026 in Maricopa County — the first criminal charges by a state against a CFTC-registered prediction market. Charges include operating an unlicensed gambling business AND 4 counts of election wagering (not sports-only). Initial appearance in Maricopa County criminal court: April 13, 2026. Separate federal PI hearing (Kalshi v. Arizona, Judge Liburdi): April 3. CFTC Chair Selig called charges entirely inappropriate as a criminal prosecution.
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Prediction Markets Are Gambling Act: Senate Bill to Ban Sports Contracts
Sens. Adam Schiff (D-CA) and John Curtis (R-UT) introduced the Prediction Markets Are Gambling Act on March 23, 2026 — the first bipartisan Senate bill targeting prediction markets. The bill would prohibit CFTC-registered entities from listing sports prediction contracts or casino-style games. If passed, would remove sports event contracts from Kalshi and Polymarket.
The Five Strongest Anti-PM Arguments
These are presented in order of rhetorical strength — starting with the arguments that even PM supporters find hardest to dismiss.
What Bans Would Actually Do
The debate is really about six categories. Financial, weather, and economic event contracts have very few critics.
| Category | Full ban (STOP Corrupt Bets) | Sports-only (Schiff-Curtis) |
|---|---|---|
| Sports markets | Banned | Banned |
| Election markets | Banned | Stays |
| War / terrorism markets | Banned | Stays |
| Financial / economic markets | Stays | Stays |
| Weather markets | Stays | Stays |
| Government-activity markets | Banned | Stays |
Table is editorial summary of bill scopes. See the full legislative tracker for verified bill text details.
Honest Bottom Line
Critics aren't wrong to be skeptical. The insider-trading concern is verified by real CFTC enforcement cases. The official-conflict argument is structurally sound. The sports-gambling-by-another-name argument has real legal force — that's why bipartisan bills have advanced.
What critics often miss: financial, weather, and economic event contracts have almost no critics. The controversy is concentrated in six categories: sports, elections, government accountability, war, terrorism, and death contracts. The debate is being fought with the worst examples on both sides.