Hormuz Tanker Traffic Drops to Zero as Iran Talks Collapse, Stranding 80 Million Barrels

No tanker moved outbound through the Strait of Hormuz on Friday morning, June 19, after U.S.-Iran peace talks collapsed before formal negotiations even started. Brent crude was trading at $80.47 per barrel on the ICE exchange as of late morning June 19, up $0.62 on the day. WTI traded at $76.54 per barrel on the CME, up 0.91%, per OilPrice.com data.

From 18 Transits to Zero Overnight

Thursday, June 18, saw 18 outbound tanker transits through the Strait of Hormuz, the highest single-window count recorded since Iran closed the waterway in early March. Friday morning vessel-tracking data showed zero outbound transits. Two inbound vessels crossed: one Norway-flagged products tanker and one Iran-linked LPG carrier.

The reversal followed Iran's decision to postpone permanent peace negotiations. Talks were scheduled for Switzerland on Friday, enabled by the Islamabad Memorandum signed June 17, which formally ended the U.S.-Iran conflict. Intensified fighting between Iran-backed Hezbollah militants and Israeli forces in southern Lebanon prompted Tehran to delay.

80 Million Barrels Queued, Worth an Estimated $6.4 Billion

An estimated 80 million barrels of crude were queued for Hormuz transit when the talks collapsed, per vessel-tracking data. Three Saudi-flagged supertankers carrying about six million barrels had already cleared the strait following the Islamabad Memorandum signing. At Brent's June 19 intraday price of $80.47 per barrel, those stranded barrels represent roughly $6.4 billion in crude value.

About 10% of the world's very large crude carriers remain loaded inside the Persian Gulf. Each VLCC carries roughly two million barrels. Jotaro Tamura, CEO of Mitsui OSK Lines, the world's largest tanker operator by fleet size, stated it "may take at least a couple of weeks or if not a month" before operators return to normal transits through the strait.

Goldman Forecast Challenged, AER Projects Differential Narrowing

Goldman Sachs raised its Brent crude forecast to $90 per barrel for Q4 2026 at the height of the Hormuz disruption, per Bloomberg, then trimmed that outlook after the Islamabad Memorandum, projecting Gulf export normalisation by end of June. The June 19 talk collapse challenges both that timeline and the resulting forecast cuts. A prior Oil Authority analysis tracked Brent falling to $79 when the deal was signed; Brent has since recovered to $80.47 as markets price in the breakdown.

The Alberta Energy Regulator projected the Western Canadian Select discount to narrow toward US$12.00 per barrel as uncertainty eases and 2026 production rises, per its ST98 price forecast. WCS for July delivery in Hardisty settled at $11.90 per barrel below WTI on June 10, per brokerage CalRock, in line with that forecast. With WTI at $76.54 per barrel as of late morning June 19, implied WCS pricing stands at $64.64 per barrel.

Trans Mountain Apportionment Adds Structural Pressure

Trans Mountain's expanded line triggered apportionment for the first time since completing construction in 2024, because June shipment demand exceeded available spot capacity, per BOE Report. Al Salazar, head of research at Enverus, noted the WCS differential "has been volatile with global crude price swings since the start of the U.S.-Iran conflict." Alberta producers selling into a discounted market with Trans Mountain at capacity face constrained options regardless of how quickly diplomatic talks resume.