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California bans officials from using inside knowledge to bet on prediction markets

By Thomson Reuters Mar 27, 2026 | 1:01 PM

By Jasper Ward

WASHINGTON, March 27 (Reuters) – California Governor Gavin Newsom on Friday issued an executive order ​barring state officials from using ‌insider knowledge to bet on prediction markets like Polymarket and Kalshi.

The move comes amid concerns that government officials could use ‌inside ​information to profit from ⁠such markets after ⁠an unknown trader made more than $400,000 betting that Venezuelan President Nicolas Maduro would be ousted from his position ​ahead of a U.S. mission to capture the leader.

All gubernatorial appointees ⁠are now banned ⁠from using any non-public information ​to personally profit or assist another ​person, including family or former business ‌partners, from profiting off predictive markets, according to Newsom’s order.

Polymarket and Kalshi are the two biggest prediction ⁠market platforms. Polymarket did not immediately respond to a request for comment.

Kalshi posted on ⁠X on ‌Friday: “At Kalshi, insider trading ⁠violates our rules, and we ​enforce ‌them when we catch ​insiders … Government ⁠employees should be aware that trading on federally regulated markets using material non-public information violates the law.”

(Reporting by Jasper Ward in Washington, editing by ​Michelle Nichols )