Oil prices were little changed on Wednesday, with Brent settling near $89 a barrel and WTI near $83, as traders weighed a stalled US-Iran ceasefire track and fresh attacks on Gulf shipping against a surprise build in US crude inventories and downgraded demand forecasts from both OPEC and the IEA. WTI traded in a range of approximately $82 to $84, while Brent moved between roughly $88 and $90. The session reflected a market caught between competing signals: geopolitical risk that would typically argue for higher prices, and a swelling supply picture that kept gains in check.

Price action was muted relative to the scale of the headlines, with both benchmarks essentially flat on the session—a sign that the market has already priced in a prolonged standoff rather than an imminent breakthrough.

Diplomatic Backdrop Deteriorates

A senior Iranian source told Reuters there is currently no discussion between Tehran and Washington about extending their ceasefire, on the basis that the existing arrangement never had a defined start date and therefore has nothing formally to extend. That stance contrasts with Pakistan's Foreign Ministry, which said earlier in the session that it continues to facilitate direct and indirect diplomatic channels between the two sides and that the ceasefire deadline, five days out, could still be pushed back.

Separately, both the United States and Houthi forces reported attacks on shipping in the Strait of Hormuz and the Bab el-Mandeb Strait—two of the region's critical oil and gas export corridors alongside the Suez Canal. The Strait of Hormuz normally handles roughly 20 million barrels of oil per day—about a fifth of global consumption—making any sustained disruption a supply shock on a scale few other chokepoints can match. Vessel data showed transits through the Strait of Hormuz falling to a one-week low of around eight on Tuesday, compared with a pre-war daily average ranging from 125 to 140.

OPEC and IEA Revise Demand Lower

On the supply and demand side, the picture turned more bearish. OPEC trimmed its 2026 global demand growth forecast to approximately 580,000 barrels a day in its latest monthly report. The IEA cut its own demand outlook further, now projecting global oil demand will contract by roughly 1.6 million barrels a day this year. The two agencies have diverged sharply on demand through much of the past year, with OPEC consistently projecting stronger growth than the IEA, making their simultaneous downward revisions a notable convergence.

Analysts noted that the demand downgrades likely reflect refiners—particularly across Asia—being physically unable to secure sufficient crude while Hormuz remains constrained, forcing plants to operate below capacity rather than signaling a genuine collapse in underlying consumption. The open question, as one portfolio manager observed, is how much of that lost demand returns once the conflict ends and how much represents permanent destruction.

IEA Widens Q3 Deficit Forecast

Countering the bearish demand read, the IEA simultaneously widened its third-quarter deficit forecast to approximately 1.8 million barrels a day—more than double its previous estimate of roughly 800,000 barrels a day. The agency warned that inventory buffers are being drawn down quickly, raising the stakes attached to any further delay in reopening the strait. The widening deficit argues that the supply side remains the dominant price driver, and with buffers draining, any further escalation in shipping attacks carries outsized upside risk to prices.

US Crude Stocks Post Largest Build Since Early 2023

The week's inventory data added another bearish element. US commercial crude stocks recorded their largest weekly build since early 2023, rising by approximately 17 million barrels. The Strategic Petroleum Reserve was drawn down by roughly 6 million barrels over the same period, resulting in a net overall build of about 11 million barrels. Analysts attributed the build primarily to unusually weak crude exports during the week combined with a jump in imports, rather than any material easing in the underlying supply disruption. Gasoline and distillate stocks drew down somewhat less than expected, while production held broadly steady at around 13.8 million barrels a day—near the all-time US record.

Outlook

Taken together, the session leaves oil markets positioned for continued two-way volatility. The deficit and inventory-buffer narrative is keeping a floor under prices, even as diplomatic deadlock and ongoing shipping attacks argue against any near-term resolution.