Polymarket buckles down on insider trading after suspiciously timed bets

CBS News
March 23, 2026
3 min read

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The Bottom Line

Polymarket tightened trading rules after investigators found suspiciously timed bets suggesting some users traded on non-public government information.

How This Affects You

If you use prediction markets, stricter rules may reduce your trading flexibility, but protect against unfair insider trading by government officials or connected traders.

AI Summary

Polymarket, a cryptocurrency-based prediction market platform, has tightened its trading rules following scrutiny over suspiciously timed bets that raised questions about insider trading by some users. The platform allows people to wager on the outcomes of real-world events, from elections to corporate developments, making it vulnerable to traders acting on non-public information. The rule changes reflect concern that some participants may have possessed advance knowledge of news before it became public, gaining unfair advantages in their bets. Insider trading on prediction markets sits in legal gray area, as the platforms operate outside traditional securities regulation but deal in contracts tied to real-world events where information asymmetries can be exploited. The tightening comes as prediction markets have gained mainstream attention and scrutiny from regulators and lawmakers.

What's Being Done

Polymarket has tightened its trading rules in response to scrutiny over suspiciously timed bets.

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