Polymarket's trading volume slipped 8.9% in April, landing at $10.2 billion, as competitors like Kalshi carved out a bigger slice of the prediction-market business. The decline comes at a time when the platform's U.S. expansion plans face growing regulatory scrutiny.
Volume slide and a shifting market
The monthly figure marks a notable pullback from earlier highs. Polymarket had ridden a wave of interest tied to the U.S. election cycle and other high-profile events, but April's numbers suggest that momentum is cooling. Rivals haven't been idle. Kalshi, a federally regulated exchange, has been steadily gaining market share, luring users who want a more traditional compliance framework.
Polymarket's volume still dwarfs most competitors, but the trend is clear: the gap is narrowing. The platform built its user base on crypto-native traders who value pseudonymity and global access. Kalshi, by contrast, operates under CFTC oversight, which gives it a different appeal — especially for institutional players who need regulatory certainty.
U.S. expansion under a regulatory cloud
Polymarket's ambitions to grow in the United States are running into headwinds. The company has been exploring ways to offer services more broadly within the country, but regulators have signaled they're watching closely. The platform previously settled with the CFTC over offering event contracts without registration, and any misstep could invite fresh penalties or restrictions.
The challenge is structural. Polymarket's decentralized model relies on smart contracts and stablecoin settlements, which don't fit neatly into existing U.S. commodities law. Kalshi, which went through a lengthy approval process, offers a template for legal compliance — but it also comes with tighter limits on what can be traded and who can participate.
Sources close to the talks say Polymarket's legal team has been in discussions with outside counsel about potential paths forward, but no concrete plan has been announced.
The company hasn't disclosed any specific timeline for a U.S. rollout. Meanwhile, the volume decline adds pressure. Investors who poured money into Polymarket's Series B round are likely watching the regulatory landscape as closely as the trading numbers.
The unresolved question is whether Polymarket can find a way to operate within U.S. rules without sacrificing the features that made it popular — or whether Kalshi and other rivals will continue to eat into its lead while the regulatory dust settles.
