The question asks whether the United States will officially declare war on Iran before the market closes on April 30, 2026. Given the current timeframe—just thirteen days remain—the 0% odds reflect the extremely low probability of a formal congressional war declaration or military engagement escalating to this level within such a narrow window. An official US declaration of war would require either congressional authorization under the War Powers Resolution or a formal statement recognized internationally as an act of war. Historically, such declarations are rare in modern geopolitics and typically follow extended diplomatic crises, major military provocations, or sustained hostilities between nations. The current geopolitical landscape, while featuring notable US-Iran tensions and complex regional dynamics, has not escalated to the point suggesting imminent formal war declaration by the market's close. The near-zero market price reflects trader conviction that this outcome is nearly impossible in the remaining timeframe, though any sudden major military incident or significant escalation could shift odds materially. This market resolves YES only if an official, documented declaration of war is formally announced and internationally recognized by April 30, 2026.