Google engineer arrested for alleged Polymarket insider trading claims he was gambling
Michele Spagnuolo, a Switzerland-based Google engineer, was arrested for alleged insider trading on Polymarket and contends he was gambling rather than trading on material nonpublic information. The case tests how regulators and courts will distinguish between unlawful insider trading and legitimate speculative activity on prediction market platforms, with no ruling yet on where the line falls. Both sources cite identical facts about Spagnuolo's defense and the legal uncertainty.
Spagnuolo's gambling defense threatens to become a template for every Polymarket user facing criminal charges. If courts accept that prediction markets are pure gambling venues, then material nonpublic information loses its illegal edge and the CFTC's enforcement framework collapses. Prosecutors must now prove not just that a trader knew something secret, but that the platform itself is a securities market where such secrets matter legally.
That standard shift helps retail traders but guts the agency's deterrent power against insiders with privileged data. Polymarket faces a parallel risk: a favorable ruling for Spagnuolo invites Congress to reclassify the platform as gambling rather than regulated event contracts. The CFTC's recent criminal pivot in the Van Dyke matter shows the agency sees this threat and is racing to secure precedents before gambling defenses multiply. Each new arrest tests whether the CFTC can outpace a narrative that its regulated venues are simply legalized sportsbooks.
The arrest extends a pattern of Polymarket insider-trading scrutiny to covered employees of major tech platforms, after the CFTC's criminal pivot in the Van Dyke case and dozens of military account referrals to the DOJ.