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California Residents Gain Full Access to Federally Regulated Prediction Markets

California residents now have full access to federally regulated prediction markets, providing a legal alternative to traditional sports betting in a state without legal online sportsbooks. Because these contracts are classified as financial derivatives regulated by the Commodity Futures Trading Commission, they operate independently of state gambling laws.

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A November 2025 federal ruling in Blue Lake Rancheria v. Kalshi affirmed federal preemption, denying an injunction from California tribal gaming groups seeking to shut them down. Leading platforms include Polymarket, Kalshi, and OG.com. Polymarket is the largest prediction market globally, offering tight spreads on political and economic contracts. Kalshi has been CFTC-regulated since 2020 and provides a wide catalog of events with various funding options including ACH, PayPal, and Venmo. OG.com, launched in February 2026, features a parlay builder for sports fans. Traders can participate on these platforms if they are 18 or older. Unlike traditional sportsbooks where players bet against a house, prediction markets are peer-to-peer exchanges where prices reflect the crowd's estimate of the probability of an outcome.

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