Crude oil prices have been sliding as tensions in West Asia ease and vessel traffic resumes through the Strait of Hormuz, the narrow waterway that carries a large share of the world's seaborne oil. But that same easing has triggered an unexpected side effect: a scramble for oil tankers that has pushed freight rates to their highest levels of the year.

Shipbroker data cited in regional trade reports shows that a supertanker booked to carry crude from the Persian Gulf to India recently fetched a rate roughly 897% above the standard benchmark price — close to nine times the usual cost of chartering such a vessel. The ship in question, with a carrying capacity of around two million barrels, is operated by Sinokor, a South Korean logistics firm; the identity of the charterer behind the booking has not been disclosed. Analysts tracking the tanker market describe a rate spike of this size as unprecedented so far this year.

The shortage traces back to the recent conflict itself rather than to the ceasefire. During the fighting, Iran is reported to have laid hundreds of sea mines across the strait, and clearing them has proven slower than expected, creating a bottleneck even as the war-risk premium that drove up insurance costs for tankers passing through the area remains elevated. Thousands of vessels that backed up near Hormuz during the conflict are still working through delays that could take months to clear, leaving comparatively few empty tankers available for new bookings — exactly the kind of supply squeeze that lets charter rates spike even when oil itself is getting cheaper. Under the terms of the broader US-Iran de-escalation deal, mine clearance is supposed to be completed within 30 days; market participants expect tanker rates to climb further if that deadline slips.

The knock-on effects fall heavily on Asian refiners. India and China, both large buyers of Gulf crude, are particularly exposed to a jump in shipping costs layered on top of crude purchases, and analysts expect refiners to try to pass at least some of that added freight expense on through retail fuel prices — meaning consumers may not see the full benefit of cheaper crude even as benchmark oil prices fall. Brent crude was recently trading near $76 a barrel, a four-month low, but S&P Global Energy expects prices to firm back up to the $80-90 range in the second half of the year as countries that depleted reserves during the conflict look to restock, suggesting the current dip in pump prices, if it arrives at all, may be short-lived.