US Navy intercepts sanctioned vessel M/V Sevan in Arabian Sea

The U.S. Navy intercepted the M/V Sevan, a sanctioned vessel, in the Arabian Sea. The likelihood of 80 ships transiting the Strait of Hormuz by April 30 is at 2.8% YES, down from 51% a week ago.

The interception represents direct U.S. enforcement action in the region and has raised doubts about whether normal maritime traffic will resume before month’s end. The Strait of Hormuz Traffic market has dropped consistently over the past week as traders price in the U.S. Navy’s expanded operations across the Arabian Sea and Indian Ocean.

The volume traded in this market is as telling as the odds. With 24-hour USDC volume at $1,797, it takes just $542 to move the odds by 5 percentage points. The market is thin enough that relatively small trades can cause large swings, which means interest is real but not deep enough to absorb unexpected news without sharp moves.

This interception shows the U.S. enforcing sanctions through direct naval action rather than financial measures alone. For traders, the question is whether this is a one-off or the beginning of a pattern that further disrupts shipping lanes. At 3¢ per YES share, a successful bet on 80 ships transiting by April 30 pays $1, a 33.3x return. To justify that bet, you’d need to believe in rapid de-escalation or a sharp reversal in enforcement strategy.

Watch for statements from CENTCOM and the Iranian Armed Forces, along with any diplomatic signals that could change enforcement intensity. The next Navy briefing or a sudden policy shift could move this market fast.

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