Traders on prediction platforms Kalshi and Polymarket are betting that the nation’s highest court is unlikely to rule in favor of President Donald Trump 's tariffs.

Traders on Kalshi now give only a 25% chance that the Supreme Court will side with Trump’s tariff plan, down 20 points after oral arguments signaled potential skepticism from the justices.

The trading volume, or the total dollar amount wagered on this market, is a little more than $1 million.

Polymarket mirrors that sentiment, with odds also at 23%, down 15 points over the same period of time. The trading volume on Polymarket is a little north of $1.1 million.

Kalshi and Polymarket let users bet real money on everything from politics and economic policy to sports and pop culture, transforming public sentiment into t

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