Iran demands control of Hormuz shipping lanes, Brent holds at $87

Iran rejected a Gulf-backed plan to share control of the Strait of Hormuz on Tuesday, demanding instead that all inbound vessels pass through its waters and declaring the international shipping lanes that have governed the waterway since 1968 void.

"The existing TSS is located mostly in Omani waters and cannot safeguard Iran's national security under current conditions," Iran's Deputy Foreign Minister Gharibabadi said, according to state media. "If our proposal is not accepted, the Strait will remain closed."

The proposal, submitted through Omani mediators, would require all inbound vessels to transit Iranian waters while rerouting a portion of outbound traffic as well. Iran also barred any third country from conducting mine clearance operations in the Strait, even if invited by Oman. The stance puts Tehran at odds with a rival plan backed by Gulf states that would model navigation on the Strait of Malacca's voluntary fee system, under which ships choose whether to contribute to environmental and safety programs.

The Strait handled about a fifth of the world's oil and liquefied natural gas before the US-Israeli campaign against Iran shut it in February. Brent crude traded near $87 a barrel Tuesday, paring an 8% drop from Monday after President Donald Trump halted a two-week bombing campaign and said "good talks" were underway with Tehran. The failure of those talks to produce a navigation framework could send prices sharply higher, with hedge funds already piling back into bullish crude bets — net long positions in ICE Brent futures and options hit a two-month high of 192 million barrels last week.

Iran Seeks Institutional Change, Not Just Disruption

The Iranian proposal marks a significant hardening of Tehran's position since the June memorandum of understanding with Washington, which collapsed in early July after Iran fired on ships using an unapproved channel. Oman had presented a compromise framework backed by Gulf states that would have split management of the waterway's two-way traffic lanes between Iran and Oman, with voluntary transit fees replacing mandatory charges. Iran's rejection of that plan, and its simultaneous abolition of the International Maritime Organization's 1968 Traffic Separation Scheme, signals an attempt to reshape the Strait's governance architecture entirely.

For global oil markets, the stakes are immediate. Open interest in ICE Brent futures has fallen 11% year-over-year, amplifying the amplitude of price swings — last week's rally and this week's sudden drop both exceeded 5%. Diesel may be the most exposed product: hedge funds have ramped up net long positions in ICE gasoil to 84,540 lots, higher than at any point during the initial US-Iran conflict earlier this year. The Houthi missile attack that disabled Saudi Aramco's 400,000 barrel-per-day Jazan refinery over the weekend adds a second chokepoint risk, with the Bab el-Mandeb Strait also effectively closed to commercial shipping.

The last time Iran asserted unilateral control over the Strait's navigation rules was during the 1980-88 Iran-Iraq War, when the "Tanker War" saw both sides attack oil vessels and led to US naval intervention under Operation Earnest Will. That conflict ultimately failed to alter the Strait's governance. This time, Iran is seeking institutional change — not just temporary disruption — by abolishing the TSS and demanding a permanent role in managing traffic through its waters.

Diplomatic Window Narrows as OPEC+ Holds Steady

OPEC+ is expected to halt its gradual output increases after September and keep production steady through the remainder of 2026, buying time for negotiations over national quotas. But with Iranian crude exports already constrained by sanctions and the Strait's closure, the producer group has limited spare capacity to offset a prolonged disruption. China's seaborne crude arrivals are recovering to 7.8 million barrels per day in July from a 10-year low of 6.2 million in June, as stranded Gulf cargoes finally reach Chinese ports, but domestic consumption remains constrained.

Diplomatic channels remain open. Omani officials met Iranian counterparts in Tehran over the weekend, and Iranian Foreign Minister Abbas Araqchi discussed the Strait with his Omani and Saudi counterparts on Monday. Trump is scheduled to meet Israeli Prime Minister Benjamin Netanyahu in Washington on Tuesday, though Israel has not participated in the peace talks and relations between the two leaders have been strained. If negotiations fail to produce a framework acceptable to both sides, the Strait's closure — and the volatility it injects into global energy markets — could persist well into the fourth quarter.

This article is for informational purposes only and does not constitute investment advice.