Iranian Supreme Leader adviser Rezaei says if the blockade continues, US vessels and forces will face serious risks and casualties

"US must change its behavior or we will not tolerate this. We will never permit the opening of a second corridor in the Strait of Hormuz."

Threats of this kind from senior Iranian figures against US forces and shipping in the Gulf are a recurring feature of pressure cycles between Washington and Tehran, and historically the market's job has been to distinguish rhetorical escalation from actual interdiction. The named channel here is the Strait of Hormuz, through which a large share of seaborne crude and LNG transits, so the crude complex has typically responded through the front of the oil curve, freight and war-risk insurance rates, and option skew rather than through outright supply loss; past episodes of tanker harassment or seizure produced sharp but often short-lived premia unless physical flows were interrupted. The reference to a blockade frames this as a response to US sanctions enforcement rather than a unilateral move, which matters because the escalation ladder in such episodes has usually run rhetoric, then seizures or drone incidents, and only rarely direct engagement. The actor's position as an adviser rather than the Supreme Leader himself or the operational chain of command tends to discount the signal somewhat, consistent with prior pattern. Worth noting next is any move in Hormuz transit insurance pricing, tanker traffic behaviour, and whether operational commanders or the Supreme Leader echo the warning, since that sequencing has historically separated noise from genuine supply risk.