China’s diplomatic activity on the Iran file is moving several Polymarket contracts. The likelihood of the US declaring war on Iran by December 31 sits at 8% YES.
Market reaction
The market for Trump visiting China by May 31 is at 75.5% YES, down from 78% yesterday. Traders appear to read China’s diplomatic positioning as compatible with a visit. The odds for no US-Iran diplomatic meeting by June 30 have dropped to 8.8% YES, which points to growing confidence that some form of diplomatic engagement will happen.
The US declaration of war on Iran market is now at 7.5% YES, down from 8% yesterday. The move came on just $370 in USDC traded over the last 24 hours, so conviction is thin, but the direction is clear.
Why it matters
Chinese mediation, if sustained, would give both Washington and Tehran a face-saving channel to de-escalate. For traders, that translates directly into lower war-declaration probability. Buying NO at 8¢ in the war declaration market would yield a 12.5x return if no war is declared by year-end.
What to watch
Official US and Chinese statements confirming summit dates or new diplomatic talks with Iran. Concrete scheduling would validate the current odds and likely push war-declaration prices lower still.
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Will Trump Visit China| Contract | Odds | Δ since publish | Volume 24h | |
|---|---|---|---|---|
| April 30 | 0.5% | — | — | Trade → |
| May 31 | 75.5% | — | — | Trade → |
| June 30 | 82.5% | — | — | Trade → |
| Contract | Odds | Δ since publish | Volume 24h | |
|---|---|---|---|---|
| June 30 | 8.8% | — | — | Trade → |
| Contract | Odds | Δ since publish | Volume 24h | |
|---|---|---|---|---|
| December 31, 2026 | 7.5% | — | — | Trade → |
| April 30, 2026 | 0.5% | — | — | Trade → |
