TOTAL VOLUME:
$134.2b
24H VOL:
$126,590,312
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,439,516,703
404,175
Markets across
30,277
events
MATCHED EVENTS:
2,685
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jun 25, 11:05 AM EST
Kalshi
This market tracks whether the Supreme Court will rule that federal pesticide regulations preempt state-level failure-to-warn claims against Monsanto in the case Monsanto Company v. Durnell. On Kalshi, the probability that the Court rules in Monsanto's favor stands at 73.0%. The resolution hinges on the Supreme Court's decision regarding whether FIFRA preempts label-based failure-to-warn claims where the EPA has not required the warning. Watch for the Court's ruling, expected by August 2026, which will determine whether companies can be held liable under state law for warnings not mandated by federal regulators.
If the Supreme Court, in Monsanto Company v. Durnell, rules that FIFRA preempts label-based failure-to-warn claims where EPA has not required the warning, then the market resolves to Yes.
Prediction market odds on Kalshi reflect real-money incentives and specialized legal knowledge from traders actively monitoring Supreme Court dockets and litigation trends. Unlike traditional polling, which captures general public opinion, prediction markets aggregate the views of participants with financial stakes in accurate forecasting. The current market pricing suggests strong confidence in a particular outcome, though this may diverge from broader public sentiment or analyst commentary. Comparing market odds to legal expert commentary or historical Supreme Court ruling patterns provides useful context for evaluating the strength of the consensus.
The market is scheduled to resolve on Aug 1, 2026. Resolution is determined by the Supreme Court's final ruling in Monsanto Company v. Durnell. The outcome hinges on whether the justices rule in favor of Monsanto's position on failure-to-warn liability or reject it. Market participants are tracking oral arguments, written opinions from lower courts, and any signals from the bench regarding preemption doctrine and federal regulatory authority. The resolution will reflect the Court's definitive judgment on this significant product liability question.
Key catalysts include oral argument dates and transcripts, which often reveal judicial skepticism or alignment with one party's position. Publication of amicus curiae briefs from industry groups, environmental organizations, or state attorneys general can shift trader expectations. Any interim Supreme Court rulings on related preemption or regulatory authority questions may provide clues about the Court's ideological leanings on this case. Media coverage of Roundup litigation settlements or new scientific evidence could influence market sentiment. Finally, retirement or recusal of justices, or unexpected procedural developments, may trigger repricing before the final ruling.