Hormuz traffic falls to a four-month low as the energy bill mounts

An average of 10 commodity ships a day transited the Strait of Hormuz over the past 10 days, the lowest reading since May, according to shipping data compiled after the US and Iranian strikes on vessels¹. Oil prices extended gains as those strikes heightened concern about supply disruption⁹, with global crude rebounding to $97 a barrel amid supply chain disruption worries at the strait⁸.

The picture is contested. One assessment argues Iran is losing some of the leverage it held over the strait because it has been unable to close the waterway fully, with the US naval presence a factor¹². US Energy Secretary Chris Wright said more than 17 million barrels went through on Monday, which one former State Department energy envoy described as almost pre-war levels¹¹.

The cost and the workarounds

The war in Iran has cost US consumers $100 billion in higher energy prices, and the bill is rising by another $1 million about every two minutes, according to a real-time estimate from Brown University cited as of Monday morning⁴. Pump prices are at their highest Labor Day weekend levels on record, and Wright cautiously predicted that relief is on the way while stopping short of firm or precise pledges¹⁰.

Exporters are rerouting. The United Arab Emirates is building alternative trade and energy routes after the attacks on Iran, according to presidential adviser Anwar Gargash², who said UAE energy exports will not be held hostage³. Further west, India has become a crucial diesel supplier to Europe, accounting for about 60% of the diesel transiting Bab-el-Mandeb to the region in August as Russian exports stayed constrained and US shipments weakened^6,7.

Why it matters to investors

Transit counts are the cleanest available measure of how much of the disruption is real. Volumes through Hormuz are at a four-month low even though the strait has not been closed^1,12, which is the distinction that separates a freight and insurance problem from an outright supply shock.

The second-order effects are already visible in the numbers that central banks watch. Crude near $97⁸ and record holiday-weekend pump prices¹⁰ feed directly into headline inflation, and the consumer cost estimate is being updated in real time rather than after the fact⁴. Trade patterns are adjusting around the chokepoints as well, with Gulf exporters seeking new routes² and Indian refiners filling a European diesel gap⁶. Al Jazeera reported that Centcom released video of the tanker strikes on Saturday while the blockade continued⁵.