The United States has revoked oil waivers for Iran, a policy shift that coincides with the effective closure of the Strait of Hormuz to commercial shipping.

The decision marks a significant escalation in the ongoing regional conflict, following an Iranian attack on a U.S. naval base in Bahrain and subsequent retaliatory strikes by American forces.

The Strait of Hormuz, a critical chokepoint for global energy flows, has been shut down to shipping, severely disrupting tanker routes and raising immediate concerns about supply chain continuity.

This development follows recent attacks on three tankers in the strait, which defied ceasefire agreements and spiked shipping risk premiums.

The closure represents a direct threat to global energy security, with potential ripple effects across oil, freight, and shipping equities.

The U.S. move to revoke waivers removes a key mechanism that had allowed certain countries to import Iranian oil despite broader sanctions.