California Governor Gavin Newsom has signed an executive order prohibiting gubernatorial appointees from using insider or non-public information to bet on prediction markets such as Polymarket and Kalshi. The order took effect immediately and makes clear that California’s existing conflict-of-interest standards apply to these fast-growing event-based trading platforms.
The directive does not impose a blanket ban on public officials using prediction markets. Instead, it specifically targets situations where officials could profit from confidential information obtained through government service. It also bars appointees from helping spouses, family members, business partners, or other associates place profitable trades based on such information.
A Direct Response to Ethics Concerns Around Event Trading
Prediction markets allow users to buy and sell positions tied to real-world outcomes, ranging from elections and economic policy decisions to military actions and geopolitical developments. As these platforms have expanded, so too has concern that people with access to privileged information could use them as a new channel for insider-style trading.
In the official announcement, Newsom framed the move as an ethics measure rather than a rejection of prediction markets themselves. His office emphasized that public service should not be used as a vehicle for personal enrichment. The order draws a bright line around the use of government-derived information for private gain and effectively extends established public integrity rules into a newer financial and political arena.
Notably, the executive order does not outline a separate enforcement regime beyond California’s existing statutes. That means violations would likely be pursued under the state’s current conflict-of-interest laws and rules prohibiting the use of public office for personal profit.
Suspicious High-Value Bets Intensified Pressure
The policy shift comes after a series of high-profile prediction market trades drew scrutiny in early 2026. According to the source material, six accounts reportedly earned $1.2 million by betting on a U.S. strike against Iran, with funds deposited days before the event and wagers placed just hours before it occurred. Such timing fueled suspicion that some traders may have been acting on privileged knowledge rather than public analysis.
Another trader was reported to have achieved a 93% win rate on Iran-Israel-related events and earned nearly $1 million since 2024. In a separate example, one bettor reportedly received a $410,000 payout after staking tens of thousands of dollars on the U.S. capture of Venezuelan President Nicolás Maduro shortly before the event took place.
These cases have become central to the broader debate over whether prediction markets can be manipulated or exploited by people with access to sensitive state or federal information. Even when no formal violation has been proven, the appearance of unusually well-timed trades has prompted calls for stronger guardrails.
Platforms Under Growing Regulatory and Political Scrutiny
Prediction markets have grown rapidly after the U.S. Commodity Futures Trading Commission broadened its regulatory stance toward such platforms. Companies like Polymarket and Kalshi operate around binary outcomes, where traders buy “yes” or “no” shares tied to whether a particular event will occur. Payouts are then determined by real-world resolution.
As interest has expanded, so has the regulatory spotlight. California’s order adds to an emerging patchwork of actions at both the state and federal levels. At the federal level, Senator Adam Schiff of California and Senator John Curtis of Utah have introduced legislation aimed at prediction contracts linked to government actions and military events. Representative Seth Moulton has separately barred his own staff from using prediction markets.
These moves suggest that policymakers are increasingly concerned not only about classic election-related contracts, but also about markets tied to war, diplomacy, tariffs, law enforcement actions, and other areas where access to confidential government information could create an unfair advantage.
How the Platforms Responded
Kalshi responded quickly after Newsom’s office announced the order. The company said on X that it already bans insiders and added that it had introduced new technological controls designed to block politicians and athletes from trading in markets directly relevant to them. That statement positioned Kalshi as broadly aligned with the principle behind California’s order, even if the company did not frame the issue as a new obligation.
Polymarket also updated its market integrity rules earlier in the same week, though it had not issued a direct statement on California’s order as of Friday, according to the source. The platform sector has generally argued that prediction markets are regulated financial instruments rather than gambling products, and that existing CFTC oversight should be sufficient to address market integrity concerns.
Still, the industry now faces mounting pressure to demonstrate that it can effectively police conflicts of interest, especially when markets involve political actors, military events, or sensitive policy developments.
California’s Political Markets Are Already Large
The executive order arrives as prediction trading tied to California politics has become increasingly active. The source reports that more than $10 million has been wagered across Polymarket and Kalshi on the 2026 California gubernatorial race. Because Newsom is term-limited and cannot run again, the market has attracted intense attention from traders trying to anticipate the next leadership shift in the state.
That activity has not been free from controversy. At least two former candidates were reportedly caught betting on their own odds, and one of them faced platform penalties. Those incidents reinforced concerns that political prediction markets can create unusual incentives, especially when participants have direct knowledge of campaign decisions, endorsements, staffing changes, or private polling.
Newsom’s order therefore lands at a moment when California’s own electoral future is already being priced in real time on public markets. By explicitly banning state appointees from using non-public information, the governor is trying to prevent those closest to government from turning public access into trading edge.
What the Order Means Going Forward
In practical terms, the executive order clarifies that prediction markets are not outside the scope of public ethics obligations simply because they operate through novel contracts or fintech-style trading interfaces. California is signaling that if a public official cannot lawfully use confidential information to enrich themselves in more traditional settings, they should not be able to do so on a prediction exchange either.
The larger policy question remains unresolved. Supporters of prediction markets argue that these platforms can improve information discovery and provide real-time forecasting signals. Critics counter that markets tied to state action or military events can invite manipulation, reward unethical conduct, or erode trust in public institutions.
For now, California’s action is one of the clearest state-level attempts to draw ethical boundaries around official participation in event contracts. Whether other states adopt similar rules — and whether federal lawmakers go further — will likely shape the next phase of the industry’s relationship with regulators and public institutions.