The House narrowly rejected a Democrat-led War Powers Resolution to halt Operation Epic Fury by a 213-214 vote. The US declaration of war on Iran by December 31, 2026, trades at 7.5% on Polymarket, and the chance of Trump announcing an end to military operations against Iran by March 1, 2027, remains low.
Market reaction
Traders are holding low expectations for an end to operations. Odds on Trump ending military action by March 2027 remain depressed, and the one-vote margin in favor of continuing the campaign gives little reason for that to change. The odds of the US declaring war on Iran by April 30, 2026 sit at 0.7% YES, while the December 31, 2026 date holds at 7.5% YES. The jump from 0.7% to 7.5% between those two dates suggests the market prices in a potential escalation catalyst sometime in that window.
Why it matters
The declaration of war market trades $329 in actual USDC daily. With $2,378 needed to move the April 30 sub-market 5 points, a single large order could shift the odds meaningfully, but current trading suggests stability. The failed War Powers Resolution means Congress is not blocking military operations, which reduces the probability of a near-term cessation.
What to watch
At 8¢, a YES share on a formal war declaration pays $1 if it resolves, a 12.5x return. For that bet to make sense, you’d need to believe escalation continues unchecked through December. Watch for shifts in congressional rhetoric, particularly from Speaker Johnson, and any Pentagon briefings that signal a change in operational tempo.
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