Will 20 ships transit the Strait of Hormuz on any day by May 31?

Prediction markets put the probability at 74%: Will 20 ships transit the Strait of Hormuz on any day by May 31. Currently, markets see this as likely (74% YES). US says two American merchant ships pass through Strait of Hormuz.

What’s Happening

A prediction market tracking whether 20 ships transit the strait of hormuz on any day by may 31 currently shows a 74% probability of "YES," reflecting a sharp shift in sentiment following recent diplomatic and military developments. On May 4, 2026, the U.S. military announced that two American-flagged merchant ships successfully transited the Strait of Hormuz, marking the first such passage under a Trump administration effort to restore shipping traffic in the strategic waterway. U.S. Central Command (CENTCOM) described the transit as "a first step" in restoring normal flow, with two American missile destroyers now operating in the Arabian Gulf to support further movements. [New York Post, May 04]

The situation evolved rapidly on May 6, 2026, when Iran's Revolutionary Guard announced that safe passage through the Strait of Hormuz would be provided under unspecified procedures, following President Trump's decision to pause the U.S. military escort operation. The Guard's statement thanked "captains and vessel owners" for cooperating with Iran's regulations, signaling a potential de-escalation after weeks of heightened tensions. This announcement came just days after Iran had threatened to attack any U.S. forces guiding vessels through the waterway, making the new posture a significant reversal that directly impacts the likelihood of achieving the 20 ships transit the strait of hormuz on any day by may 31 threshold. [Aspen Public Radio, May 06]

The Strait of Hormuz, through which about 20% of the world's oil passes, remains a critical chokepoint for global energy markets and maritime trade. With Iran now offering conditional safe passage and the U.S. having demonstrated its ability to escort vessels, the key question is whether commercial shipping traffic can return to normal volumes before the May 31 deadline. The 20 ships transit the strait of hormuz on any day by may 31 metric serves as a proxy for the restoration of routine maritime operations, with the current 74% probability reflecting cautious optimism that the dual-track approach of U.S. naval presence and Iranian procedural concessions will enable a steady flow of vessels in the coming weeks. [Yahoo News UK, May 04]

Traded on Polymarket — $51K Volume

Lower-volume market on Polymarket ($51K). Wider spreads expected — enter with limit orders and be aware of slippage risk. Currently 74c YES.