Brent Crude Falls More Than 5% to $89.31 as Persian Gulf Exports Triple to 15 Million Barrels Per Day, WTI Closes at $83.40

Brent crude closed Friday's ICE session at $89.31 per barrel, shedding more than 5% across the final week of August 2026. WTI settled at $83.40 per barrel on the CME, down roughly 4% for the week. Both benchmarks posted their steepest weekly losses since early summer as traders repriced Iranian supply risk.

As recently as the week of August 14, Brent traded at $93.73 and WTI at $86.64, elevated on fears of physical disruption at the Strait of Hormuz. The risk premium has since unwound. Traders now read the US-Iran confrontation as a sanctions and economic dispute, not an imminent threat to crude flows through the strait.

Persian Gulf Export Recovery Drives the Repricing

Goldman Sachs data shows Persian Gulf crude exports recovering to approximately 15 to 16 million barrels per day. That compares with a trough of 5 to 6 million barrels per day in March 2026, when Hormuz disruption risk premiums peaked. Pre-conflict regional export levels stood at 22 to 24 million barrels per day. At 15 to 16 mb/d, the region has recaptured roughly two-thirds of its lost export capacity.

The recovery remains incomplete. Exports sit 6 to 9 million barrels per day below pre-conflict levels, sustaining a residual supply gap that keeps Brent above $89. A full recovery toward 22 mb/d would compress the risk premium further, toward Goldman Sachs's Q4 2026 Brent forecast of $80 per barrel.

WTI-Brent Spread and Canadian Oil Sands Impact

Earlier this month, the Brent-WTI spread widened to $6.19 per barrel on Hormuz disruption concerns, reflecting US onshore production's relative insulation from Gulf supply risk. That spread has since eased. With Brent at $89.31 and WTI at $83.40, the differential now stands at $5.91 per barrel.

For Canadian oil sands producers, the operative benchmark is Western Canadian Select. A prior Oil Authority report tracking WCS settlements placed the grade at $70.01 per barrel, implying a WCS-WTI differential of approximately $13.39 per barrel. Suncor Energy and Imperial Oil sell the majority of their output at WCS-linked prices. Imperial Oil's Canadian volumes are consolidated into the upstream results of its parent, ExxonMobil.

WTI fell $3.24 per barrel week-over-week, from $86.64 to $83.40. If WCS tracked proportionally, Canadian oil sands producers absorbed roughly $3 per barrel of realized price compression. At sector-wide Canadian oil sands output of approximately 3.5 million barrels per day, that translates to about $10.5 million in daily revenue loss before hedges, or roughly $73 million across the full week.

Goldman Sachs and Wood Mackenzie Sit $10 Apart on Q4 2026 Brent

The forward curve reflects genuine uncertainty between major forecasters. Goldman Sachs cut its Q4 2026 Brent forecast to $80 per barrel, while Wood Mackenzie holds at $90 per barrel, a gap of $10 per barrel. Goldman's bearish case assumes Persian Gulf exports continue recovering toward 20 mb/d by year-end, reducing the residual risk premium. Wood Mackenzie's $90 target reflects a view that sanctions enforcement and infrastructure constraints limit further export growth.

Friday's close at $89.31 per barrel sits near Wood Mackenzie's ceiling. Markets are currently pricing the cautious recovery scenario. If Goldman's thesis proves correct and export volumes extend to 20 mb/d or beyond, a move toward the $80 range would represent an additional 10% decline from current levels.

Data Catalysts for Early September

Three releases will set the tone for the week ahead. The EIA Short-Term Energy Outlook, due in early September, will contain revised global demand forecasts that could narrow or widen the Goldman-Wood Mackenzie gap. Weekly API and EIA US inventory data, covering the Labor Day holiday period, will test whether the 4.2-million-barrel crude build from the prior cycle has continued. Any further statement from the IRGC or US Treasury on Persian Gulf shipping access will function as the primary wild card for the risk premium.