US imposes full blockade on Iranian oil exports, impacting ceasefire prospects

The US announced a complete blockade to prevent Iran from selling oil, a move that cuts against the likelihood of a US-Iran ceasefire by April 15. The ceasefire market currently trades at 100% YES, though this figure could shift quickly as traders digest the implications of direct military action.

Market reaction

The blockade raises the probability of UK warships passing through the Strait of Hormuz by April 30. A US naval blockade of Iranian oil exports makes allied naval deployments more likely as countries move to protect energy supply routes. Traders appear to be pricing in a stronger UK naval presence in the region as a consequence.

Why it matters

The potential disruption to oil flow through the Strait of Hormuz puts direct pressure on crude oil markets. With supply at risk, the probability of crude prices hitting $90 by the end of June has room to climb. The blockade adds a new supply-side shock on top of existing geopolitical friction and a fragile ceasefire.

This move represents a shift from de-escalation tools like sanctions waivers to outright military enforcement. That shift undermines previous stabilization efforts and makes a formal ceasefire announcement less probable. Traders holding ceasefire-by-April-15 positions at 100¢ face real downside risk if the market reprices.

What to watch

Monitor CENTCOM statements and any announcements from the UK Ministry of Defence. Either could directly affect the odds on allied naval movements in response to the blockade.

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