US forces conducted strikes against Iran for the eighth consecutive night on July 18, 2026, continuing a campaign that began with US and Israeli military action on February 28 (Britannica). The latest strikes launched at 6pm Eastern Time, capping a week in which the two countries exchanged attacks nightly for seven straight nights before the eighth round (Al Jazeera). Israel simultaneously conducted attacks on Gaza and Lebanon as of the same date.

Oil markets have absorbed the escalation in stages. Brent crude surged more than 4% to trade above $97/barrel and WTI climbed a similar margin above $95/barrel in June when military action flared across the weekend (Yahoo Finance). Prices then settled at $93.09 for Brent on June 5, down $1.94 or 2.04%, as traders briefly priced in the possibility of a US-Iran peace deal (Reuters).

The optimism was short-lived. Oil settled up 2% at a one-month high on July 15 as US-Iran hostilities struck energy targets and disrupted flows through the Strait of Hormuz (Reuters). The Guardian reported crude prices at a four-year high on July 14 (The Guardian). By July 16, prices held near their highest level since mid-June as the Iran war escalated and Tehran reportedly asked Yemen for support (CNBC). On July 17, oil settled up again on renewed hostilities and the threat of a Red Sea closure, with Strait of Hormuz flows having slowed after a truce the previous month (Reuters).

The supply picture has deteriorated alongside the military escalation. Reuters reported on July 15 that oil exports through the Strait of Hormuz had slipped below 50% of pre-war levels. The same report flagged a projection that oil prices could exceed $110/barrel in the fourth quarter of 2026 if disruptions persist.

A brief counter-current appeared on July 10, when oil settled lower as traders grew hopeful that shipping would eventually improve despite the latest round of US-Iran fighting (Reuters). That dip was fully reversed by the following week's renewed strikes on energy infrastructure.

US stock-index futures were little changed on July 9 amid the Middle East fighting, with WSJ's live market coverage noting oil prices rose in that session (WSJ). The WSJ live coverage page for July 20, 2026 was not surfaced by search; the closest dated results were July 13, July 9, and July 6.

The broader context here is a supply chain under sustained pressure from two chokepoints simultaneously. The Strait of Hormuz, through which roughly a fifth of global oil consumption normally transits, is now operating at less than half capacity. The Red Sea closure threat adds a second layer of disruption to a route that already saw shipping rerouted and insurance premiums spike during earlier phases of the conflict. When two of the world's most critical maritime oil corridors are compromised at once, the geopolitical risk premium embedded in crude prices shifts from a temporary spike to a structural feature of the market.

The $110/barrel fourth-quarter projection from Reuters warrants skepticism on two fronts. First, it assumes the current tempo of strikes continues through autumn, which conflicts have a way of not doing. The brief truce that preceded the current escalation cycle, and the July 10 dip on shipping optimism, both illustrate how quickly sentiment can pivot on a single headline. Second, even at reduced flow rates, the physical market has not yet evidenced shortages severe enough to justify that price level in the near term. Brent at $93–$97 already incorporates a substantial risk premium.

For investors and corporate treasurers, the operative question is not whether oil goes to $110 but whether the current band of $93–$97 holds. Sustained prices in this range flow through to gasoline, diesel, and petrochemical feedstocks with a lag of roughly four to six weeks. That means the pump-price impact of the July escalation will arrive in August and September, precisely as the Federal Reserve weighs whether inflation has cooled enough to justify further rate cuts. An energy-driven inflation pulse in late summer would complicate that calculus considerably.

The conflict's scope also matters for portfolio construction. With Israel conducting parallel operations in Gaza and Lebanon, and Iran requesting Yemeni support, the risk of a regional widening is not theoretical. Each additional front raises the probability that Hormuz flows deteriorate further or that the Red Sea becomes fully impassable for commercial traffic. That tail risk, more than the current spot price, is what oil options markets are pricing.