Kalshi and Polymarket Under Pressure as Lawmakers Raise Insider Trading Concerns

Kalshi and Polymarket are intensifying their efforts in Washington as U.S. lawmakers weigh new regulations to curb what some call "wild west" behaviour in prediction markets. This legislative push follows a series of high-profile, suspiciously timed bets on geopolitical events, including military actions in Iran and Venezuela, which have raised alarms over possible insider trading.

The two platforms are taking different approaches to appeal to regulators. Kalshi, which is regulated in the U.S., is promoting itself as the rule-following option, running ads that highlight its transparency and its decision not to allow "death markets." On the other hand, Polymarket uses decentralized blockchain technology and is facing more questions about its international operations, which let people trade anonymously.

There are at least eight bills moving through Congress right now, all aiming to make prediction markets more trustworthy. One key proposal, the Event Contract Enforcement Act from Representative Blake Moore, would give the Commodity Futures Trading Commission (CFTC) more power to ban contracts related to war, assassination, or terrorism.

Lawmakers are especially worried about bets that seem unusually well-timed. For example, anonymous traders on Polymarket reportedly made over $1.2 million by correctly guessing when U.S. military strikes in Iran would happen, just hours before the news broke. Similar trends appeared during the fall of former Venezuelan President Nicolás Maduro, when some accounts turned small bets into six-figure wins.

To navigate this hostile environment, both firms are tapping into their political networks. Kalshi has notably hired veterans from prior Democratic administrations to bridge the gap with skeptical lawmakers. Meanwhile, Polymarket is working to formalize its market integrity standards to align with emerging US Lawmakers Target Insider Trading in Prediction Markets trends.

Concerns about insider trading have been raised following a significant financial event on the Polymarket prediction platform. Specifically, four new digital wallets collectively profited over $600,000 by betting on a diplomatic ceasefire. The suspicious timing and unusually low odds of these trades, executed just before the official announcement, strongly indicate the use of non-public information. This incident underscores the ongoing regulatory challenges for decentralized betting markets.

Despite the flurry of legislative activity, the odds of these bills passing remain uncertain. Deep political divisions and the complex ties between the tech industry and Washington figures continue to complicate the path toward a unified federal framework for decentralized prediction markets.