US Navy blockade traps 500 vessels at Iranian ports, traffic plummets

The U.S. Navy’s blockade of Iranian ports is now in its fourth day, with about 500 vessels trapped and traffic running at 10-25% of pre-conflict levels. The April 30 market for traffic returning to normal sits at 6.5% YES, down from 12% a week ago.

U.S. forces are conducting boarding operations to enforce sanctions and restrict contraband. The April 30 market reflects deep skepticism about a quick resolution given the fragile ceasefire and heavy military presence in the strait.

The May 31 market trades at 83% YES. That 76-point spread between the two contracts means traders expect the blockade to end sometime in May, not April. Daily USDC volume on the April 30 market is $2,109, with only $621 in order book depth to move the price 5 points, so a single concentrated trade could shift the line noticeably.

The blockade is a direct military and economic escalation. Trump has expressed optimism about mediation efforts, but the April odds say traders aren’t buying it. A YES bet at 6¢ pays 16.67x if traffic normalizes, but that requires a rapid diplomatic breakthrough and a meaningful shift in U.S.-Iranian negotiations within days.

Watch for Trump’s next public statements and any movement from Pakistani mediation efforts. Either could move the April and May contracts quickly.

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