Greater proportion of non-Iranian ships crossing Strait of Hormuz, data shows

Traffic through the Strait of Hormuz is shifting, with more non-Iranian ships transiting and 5 very large crude carriers leaving the Gulf between May 20 and May 26, but the situation remains highly volatile amid Iranian attacks and US retaliation. The US sanctioned Iran’s new Persian Gulf Strait Authority and warned Oman against any tolling scheme, while Oman reportedly said it has no plans to impose fees. The disruption raises fresh risk to Gulf hydrocarbon exports and global energy markets.

Analysis

The market is signaling a shift from a binary shutdown risk to a more fragmented, fee-based chokepoint regime. That matters because even a partial normalization of non-Iranian transits can compress the geopolitical risk premium in prompt crude, while still leaving embedded friction costs in freight, insurance, and routing — a combination that is usually bearish for outright oil but bullish for volatility and tanker utilization. The first-order loser is any Gulf exporter dependent on uninterrupted passage; the second-order winner is the shipping ecosystem that can arbitrage complexity, especially operators with compliant fleets, strong balance sheets, and exposure to longer-haul rerouting.

The most important near-term catalyst is whether the US enforcement threat changes the behavior of counterparties more than the physical threat changes shipper behavior. If Asian buyers conclude that paying any transit fee or seeking Iranian coordination creates sanctions contagion, volumes could fall sharply again within days, even absent a full closure. Conversely, if the corridor proves functionally passable for non-Iranian-linked tonnage over the next 2-4 weeks, the market may quickly reprice from acute supply-loss to manageable disruption, which would be negative for front-month oil but supportive for refinery margins and consumer discretionary input costs.

The underappreciated angle is that tolling introduces a quasi-tax on Gulf exports that is not symmetric across barrels. Lower-cost, shorter-distance barrels into Asia are less elastic than Atlantic Basin crude, so any persistent friction likely widens the Brent-Dubai spread and advantages producers/marketers with alternative routing optionality. Tankers, insurance brokers, and select LNG/shipping names may benefit more than generic energy equities because they monetize congestion rather than commodity direction.

The contrarian view is that the headline risk may be overstated for outright supply loss and understated for market microstructure. A narrow corridor can remain operational while still extracting enough friction to keep implied volatility elevated, meaning crude direction may disappoint bulls even as related equities with leverage to freight rates outperform. In other words, the best trade may be to own disruption, not barrels.

Key Decisions for Investors

• Long FRO / STNG on a 2-6 week horizon: thesis is higher tanker utilization and longer effective voyage times if Gulf coordination remains messy; use a basket to avoid single-name execution risk.
• Buy near-dated Brent upside via call spreads or calendar spreads rather than outright futures: if the corridor stabilizes, prompt crude should soften, but any renewed enforcement/attack cycle can reprice front-month volatility quickly.
• Pair trade long XLE vs short maritime insurers / logistics-sensitive names with Gulf exposure: the market is likely overpaying for immediate oil upside and underpricing the margin hit from tolling/friction on trade flows.
• If you can access regional equities, favor Asian refiners/importers with secure supply optionality over Gulf exporters for the next 1-3 months; the economics of forced rerouting tend to widen product cracks before they damage demand.