The Goldman Sachs prediction market ban, which limits employee trading to sports and entertainment contracts and blocks positions tied to the bank itself, elections, financial markets, macroeconomic data, and geopolitics, is one of the most explicit corporate responses yet to a fast-developing compliance headache across Wall Street.
According to a Traders Union report citing the internal memo, staff were told to confine any prediction market activity to sports and entertainment categories. A Goldman spokesperson declined to comment on the specifics but confirmed the bank bars employees from using material, non-public information to trade in any market.
The Case That Shifted the Conversation
The backdrop is a criminal and regulatory action that companies across industries are watching closely. On 27 May 2026, the U.S. Attorney’s Office for the Southern District of New York unsealed a criminal complaint against Michele Spagnuolo, a Google engineer and Italian citizen resident in Switzerland, who had been trading on Polymarket under the handle ‘AlphaRaccoon’.
The Commodity Futures Trading Commission (CFTC) and the Department of Justice alleged Spagnuolo used confidential knowledge of Google’s ‘Year in Search’ lists to trade event contracts, netting about $1.2 million in alleged profits. The criminal complaint charged him with money laundering, commodities fraud, and wire fraud, according to CNBC.
Google stated it is cooperating with law enforcement and that using confidential information to place bets is a serious breach of company policy, Al Jazeera reported. Polymarket, for its part, claimed cooperation credit: a spokesperson said the platform ‘is the only prediction platform to date whose cooperation has led to insider trading charges in the United States.’
The case has pushed compliance teams to ask a question that had previously gone unanswered: do existing insider trading policies cover prediction market contracts, or do firms need bespoke rules? Of 50 companies CNBC contacted, only three confirmed they already have prediction market policies. Two others said they are reviewing the issue. JPMorgan Chase has advised caution; Morgan Stanley confirmed related policies exist in its employee code of conduct; Bank of America is updating internal guidance.
Goldman Sachs Prediction Market Rules in a Fractured Regulatory Landscape
The Goldman Sachs prediction market restrictions land as the federal-versus-state battle over these platforms reaches a new intensity. The CFTC sued Minnesota one day after Governor Tim Walz signed a first-in-the-nation ban into law on 19 May 2026, making it the agency’s sixth lawsuit in seven weeks against a state seeking to restrict CFTC-registered prediction markets, according to analysis by Sheppard.
The CFTC has also filed suits against Connecticut, Illinois, and New York, submitted amicus briefs in multiple federal circuit courts, and filed in the Supreme Judicial Court of Massachusetts. A federal court in Arizona issued a preliminary injunction blocking that state from using gambling laws to prosecute prediction market operators, according to the CFTC.
States are not backing down. A 38-state coalition has filed briefs in pending preemption actions supporting state gambling oversight, and a bipartisan group of 41 state attorneys general has submitted comments to the CFTC arguing that prediction market contracts are indistinguishable from sports betting and fall within states’ traditional police powers. Minnesota’s ban goes further than any other state targeted so far, extending to weather-related event contracts as well.
On the platform side, Google updated its Chrome Web Store rules to ban browser extensions facilitating real-money prediction market transactions, with enforcement scheduled for 1 August 2026. Congress is separately moving: House Administration Committee Chairman Bryan Steil has said lawmakers are working to extend a proposed congressional stock trading ban to cover prediction market contracts.
Kalshi and Polymarket have both added compliance tooling to flag suspicious trading patterns. Legal experts have told CNBC that exchanges should not be the last line of defence: internal policies and employee training are the floor, not the ceiling.
The CFTC’s preemption cases will eventually produce circuit-level precedent on whether federal derivatives oversight trumps state gambling law. That ruling, whenever it comes, will determine whether the compliance posture Goldman just adopted becomes industry standard or a rounding error in a market that gets regulated out of existence.
