Why Goldman Raised Its Brent Forecast While Oil Fell on Iran Deal Hopes

Goldman Sachs raised its forecast for Brent crude to an average of $105 a barrel in December. Earlier on Monday, oil fell on reports of possible US-Iran diplomacy. The two headlines sound contradictory only if a forecast for an entire future month is read as a quote for a barrel trading now.

Our Daily Strike report on the forecast and the selloff covered the first reaction. The fuller OilPrice account of Goldman’s revision says the bank lifted its December estimate from $90 to $105, citing greater risk to supply security. It also raised its 2027 average estimate from $80 to $88. These are Goldman’s projections, not prices at which oil traded on Monday.

A forecast and a market quote answer different questions

The December number describes what Goldman expects Brent to average across that month. The OilPrice report on Monday’s decline said Brent was quoted at $109.82 a barrel at the time of writing, even as its headline described a 3% slide. That quote is a snapshot, not a December average; the report does not establish a full-day settlement or an official daily spot assessment. Nor does the difference between $109.82 and $105 measure a market “discount” to Goldman’s forecast. They cover different dates and methods.

The direction of each change matters more. Goldman revised its view up relative to its own earlier forecast. Traders marked the current oil market down relative to its preceding level as diplomatic hopes grew. A forecast can rise while a day’s price falls, and the price can still be above the forecast. For a broader guide to the benchmark itself, see our Brent and WTI explainer.

What the Hormuz premium covers

Goldman’s reported supply-security concern has a physical basis, though OilPrice does not publish the bank’s full model. The EIA’s October Short-Term Energy Outlook says tanker risk, insurance costs and longer routes are raising the cost of delivered crude. EIA estimated global oil inventories fell by an average of 1.9 million barrels a day in the third quarter and forecast a further average decline of 0.7 million barrels a day in the fourth. Those figures describe a thinner cushion against another interruption; they do not quantify how many dollars of Monday’s Brent quote are a Hormuz risk premium.

The scale of the shipping route explains why traders keep watching it. EIA’s chokepoint data put oil and petroleum-liquid flows through the Strait of Hormuz at 20.9 million barrels a day in the first half of 2025. That is a pre-conflict benchmark, not a claim about today’s traffic. EIA later estimated just 4.9 million barrels a day transited in the second quarter of 2026, versus 21.6 million in the fourth quarter of 2025, in its August outlook. The timing of those estimates matters: neither is a verified November transit count.

Producer policy offers limited reassurance on its own. OPEC’s Nov. 1 statement says seven OPEC+ countries agreed to maintain their September 2026 required production levels for December. A production target is not a guarantee that cargoes can move through a contested waterway or that insurance and freight costs will fall.

What diplomacy headlines are pricing in

OilPrice linked Monday’s decline to reports of talks between Iranian and Qatari officials and renewed hopes of a US-Iran peace agreement. Its market report also cited Iran’s foreign minister saying Tehran was prepared for both defence and diplomacy. Neither report supplies agreed terms, a timetable or a signed arrangement. A lower quote on those headlines is evidence that traders reduced the immediate price they were willing to pay; it is not proof that the shipping risk has ended.

Analysis — Lena Park: The gap is between time horizons and assumptions, rather than two conflicting measurements of one price. A durable agreement that restores reliable transit could remove part of the risk premium. A report of talks alone cannot establish that result. Conversely, Goldman’s $105 December average does not imply Brent must rise from Monday’s quoted level; an average below that snapshot is possible even under an elevated year-end forecast. The markets topic tracks the price and supply side of this story, while the Iran and Middle East topic follows the negotiations and maritime security picture.

The next useful checks are official confirmation of the reported talks and their terms, observed Hormuz flows and freight costs, and the next EIA inventory update. Each can test a different part of the story. None of Monday’s headlines alone establishes where Brent will settle.