Following a warning from the White House regarding betting on sensitive matters, Senator Richard Blumenthal is seeking explanations from Polymarket's CEO, Shayne Coplan.
Last month, the White House cautioned its staff against leveraging their positions for profitable predictions in betting markets. In response, Senator Blumenthal has raised concerns about how anonymous traders have managed to earn substantial sums—sometimes in the six- and seven-figure range—by placing bets just moments before significant classified military decisions were made public.
In a letter sent last week, Blumenthal requested a response from Coplan by April 24, highlighting what he perceives as Polymarket's inability to curb insider trading related to national security issues.
Polymarket has increasingly been viewed as a platform for illicit trading of national security information. Recently, the platform controversially allowed wagers on the life of a U.S. servicemember and facilitated questionable bets regarding a ceasefire with Iran.
Just days before Blumenthal's letter, three accounts on Polymarket collectively earned over $600,000 by accurately predicting the timing of a ceasefire between the U.S. and Iran. These traders had begun purchasing contracts at odds below 35% in March and April, later changing their user handles, as reported by Bubblemaps.
Blumenthal expressed concern that Polymarket has morphed into a market for exploiting national security secrets, warning that it could serve as a “honeypot” for foreign intelligence agencies monitoring unusual betting patterns.
In a related development, the White House Management Office sent an email to staff on March 24, reiterating the prohibition against using government information for personal financial gain, coinciding with President Trump’s announcement of a halt in military strikes against Iran.
In the moments leading up to that announcement, traders executed over $760 million in oil futures contracts in a mere two minutes, raising alarms about potential insider trading.
While the White House confirmed the authenticity of the letter, a spokesperson for Trump stated that the president has made it clear that government officials are barred from profiting from non-public information.
The recent wagers on the Iran ceasefire are part of a troubling trend of suspiciously timed trades surrounding U.S. military actions. For instance, one trader profited over $400,000 by betting on the imminent ousting of Venezuelan President Nicolas Maduro just hours before U.S. intervention.
In another instance, as Israeli and U.S. airstrikes targeted Iranian Supreme Leader Ali Khamenei, multiple accounts had already positioned themselves to profit, with one account clearing over $550,000 shortly before the strikes occurred.