US Iran Sanctions Drive Brent Below $92, Snapping Two-Week Rally as Goldman Projects $80 to $120 Range

Brent crude fell to $92.01 per barrel on Monday, a decline of 2.54 percent on the day, as US Treasury Secretary Scott Bessent formally announced an Iran sanctions campaign at a 2 p.m. EDT press conference. WTI crude futures slid to $84.89 per barrel, down approximately 2.5 percent on the CME. Both benchmarks erased most of a two-week recovery that had lifted Brent from its August 8 low of $83.55 per barrel.

Sanctions Announcement Ends Two-Week Rally

Monday's decline reversed a sustained recovery in crude prices. Brent had traded as low as $83.55 per barrel on August 8, following diplomatic progress on an Iran-Oman shipping corridor, as Oil Authority reported at the time. Since that low, the corridor's mine-clearing schedule stalled, and prices clawed back more than $8 per barrel before Monday's sell-off. The August 8 article noted a $4.10-per-barrel residual geopolitical risk premium; Monday's sanctions escalation put that premium under fresh scrutiny.

Bessent described the sanctions program as "the largest financial offensive in history directed against an enemy." President Trump has threatened sanctions on Iran's trading partners, specifically targeting buyers of Iranian crude. Iranian crude offers to Chinese buyers had already declined ahead of the formal announcement, according to BOE Report.

Analysts Divide on Outcome

Goldman Sachs maintains a base-case Brent forecast of $80 per barrel for Q4 2026 and approximately $75 per barrel in 2027. The bank says Brent could exceed $120 per barrel in Q4 2026 if Hormuz disruptions extend for another month or more. In a downside scenario, Goldman sees Brent falling to the low $60s by end-2027 if supply rebounds faster than demand recovers. Goldman's $40-per-barrel Q4 spread between its $80 base and $120 upside reflects how directly the Hormuz outcome determines crude prices through year-end.

Commonwealth Bank of Australia projects Brent between $70 and $100 per barrel for the second half of 2026. Vivek Dhar of CBA said: "It is unclear whether U.S. policy to economically isolate Iran will prove effective." RBC Capital Markets analyst Helima Croft said Iran retains significant disruptive capabilities regardless of the sanctions framework.

Tony Sycamore of IG Markets noted that Iranian leadership remains internally divided. "The more pragmatic members of Iranian leadership would prefer de-escalation but hardliners probably prefer continued conflict," Sycamore said. Three forecasters, three positions, and no consensus on whether Monday's announcement changes the fundamental supply equation.

What the Scenario Spread Means for Alberta Producers

For Alberta oil sands operators, the calculus runs through WCS-WTI differentials. With WTI near $84.89 per barrel on Monday, and a differential consistent with AER 2026 forecasts of approximately $12 per barrel, Alberta heavy crude was priced around $72.89 per barrel. Under Goldman's base case, with Brent at $80 and the Brent-WTI spread near the current $7, WTI falls to roughly $73, placing WCS around $61 per barrel and compressing margins at higher-cost in-situ projects. Goldman's upside scenario at $120 Brent implies WTI above $112 and WCS above $100, a range that would accelerate capital return programs across major oil sands producers.

Hormuz Volume and Supply Context

Roughly one-fifth of the world's daily oil supply transits the Strait of Hormuz. As of last week, approximately 40 tankers passed through the waterway daily near Oman, representing about 80 percent of pre-conflict traffic volume. Monday's sanctions announcement raises the question of whether Iran will tighten restrictions on corridor access as leverage. Year-over-year, Brent has risen 33.7 percent, from $67.91 per barrel in August 2025 to the current $92 range, sustained by the cumulative effect of Hormuz disruption premiums through 2026.