Trump announces US blockade of Hormuz lifted by...?

The blockade was publicly announced on April 12, 2026, and as of May 30 there has been no widely reported, definitive government announcement that it will end on or before May 31; ending the blockade requires an explicit public statement from the President, an official White House or DoD release, or similarly clear government communication, and such statements are typically visible in advance through preparatory press activity or leaks. With only about a day left before the market's cutoff, the baseline expectation should discount gradual or de facto easing of maritime operations and instead focus on the probability of a discrete, qualifying announcement being issued in that narrow window.

Political and strategic incentives cut in opposite directions: the White House could benefit from a quick, public “victory” announcement if a bargaining concession was obtained or if de-escalation became politically advantageous, but senior military and allied partners often favor sustained pressure until concrete guarantees are secured, and Trump has political reasons to keep maximum leverage in a volatile region. Operationally, ending a blockade — especially one framed as an enforcement measure tied to specific Iranian behavior — usually follows confirmation of reciprocal steps or other tangible outcomes, and I see little public evidence of such reciprocal developments becoming finalized and publicized by the deadline.

Market and historical signal assessment: the market-implied probability around 17.5% reflects low expectation and is consistent with the practical difficulties and short time horizon; however, surprise announcements and last-minute diplomatic deals are possible, so I price a modestly higher subjective probability (22%) to account for the nonzero chance of a late, scripted announcement or political calculation that favors declaring an end even if on-the-water conditions remain ambiguous. Given the resolution rules’ emphasis on explicit official language, the single most important practical gating factor is whether the administration chooses to publish a clear, dated statement, and absent that, de facto changes in shipping patterns or third-party reports will not suffice for a Yes resolution.