Americans Are Trading Billions of Dollars on Polymarket’s Banned Offshore Platform

Approximately 30 percent of the trading measurement connected Polymarket comes from the United States, according to a caller study—an eye-popping number, considering that nary of those radical are legally allowed to usage the crypto-based platform.

The study, conducted by Rutgers University statistician Harry Crane, estimated that radical successful the US funneled betwixt $10.6 to $26.7 cardinal done Polymarket. To way the platform’s activity, Crane looked astatine what appeared to beryllium US-based trades connected offshore prediction marketplace platforms from May 2025 to the extremity of April 2026. He recovered that galore of the highest-volume markets connected Polymarket were US-centric, including those covering US elections and sporting events. US-based traders appeared to enactment connected Polymarket’s sports vertical astatine particularly precocious rates; the survey estimated that they accounted for astir fractional of the enactment successful those markets.

“It’s been known that determination are individuals connected there, but what hasn’t been known is the extent, whether it’s 1 oregon 10 oregon an really appreciable fraction,” says Crane, who is besides a subordinate of the Commodity Futures Trading Commission Innovation Advisory Committee, a sheet that offers national regulators guidance connected however exertion impacts markets. The Coalition for Prediction Markets, a lobbying radical connected behalf of the industry, commissioned and funded the study, though Crane maintained editorial control. Kalshi, Coinbase, Crypto.com, and different large prediction marketplace players are members of this group. Polymarket is not.

Polymarket is 1 of the astir fashionable prediction markets successful the world, allowing customers to commercialized connected the outcomes of aboriginal events ranging from the victor of the NBA Finals to the terms of bitcoin successful five-minute increments to subject actions successful Iran. It has partnered with US-based media companies similar Substack and Dow Jones, arsenic good arsenic American sports leagues similar Major League Baseball and the National Hockey League.

But Polymarket’s superior crypto-based level has been banned successful the US since 2022, erstwhile national regulators recovered that it had been operating arsenic an unregistered derivatives trading platform. Since December 2025, Polymarket has operated a abstracted prediction marketplace disposable connected a mobile app that is licensed successful the US, called Polymarket US. According to a study from Pew Research, Polymarket US’s trading measurement successful April 2026 came to astir $1.6 billion, portion the crypto-based superior level deed astir $9 billion, making it by acold the larger marketplace.

To get astir the integer blockade, US traders are thought to disguise their locations to entree the Polymarket website, often utilizing virtual backstage networks to obscure their state of origin. (Polymarket’s presumption of work prohibits the usage of VPNs.) Because of this, quantifying the size of the marketplace is difficult, and this is the archetypal large nationalist effort to connection an estimate.

Without reliable ways to straight observe site-traffic geography, Crane came up with a methodology that assumes that US traders person chiseled behaviors compared to their planetary counterparts, looking astatine the clip of time trades were made, the markets successful which trades were made (US traders, for example, are much funny successful US-based sporting events than their planetary peers). The resulting estimation is frankincense imprecise, but nevertheless offers the champion snapshot of however galore US-based users are apt participating surreptitiously. "It's not perfect, but I deliberation it provides a tenable estimation of the fraction of the measurement attributable to offshore trading," says University of Toronto Scarborough subordinate prof of concern Charles Martineau, who has studied Polymarket trading behavior. "But utilizing these indirect proxies is communal successful concern research."

Polymarket declined to comment.

The CFTC does not usually person authorization implicit offshore prediction markets, but bureau president Michael Selig told WIRED past period that he's consenting to usage extraterritorial jurisdiction to drawback atrocious actors connected a case-by-case basis. It’s unclear if the bureau would fuss tracking US-based traders who utilized VPNs to skirt the prohibition but different abided by the law. The CFTC did not respond to requests for comment.

In April determination was a precise high-profile illustration of idiosyncratic successful the United States making trades connected Polymarket: The Department of Justice charged a peculiar forces worker for allegedly utilizing classified accusation astir the seizure of erstwhile Venezuelan president Nicolás Maduro to wide astir $400,000 successful profits from Polymarket trades.

The survey suggests that US-based enactment volition proceed to flourish connected the tract if Polymarket’s crypto level maintains its marketplace share. It estimates that US-based trading measurement could scope $133 cardinal by 2030.