Brent crude futures rose more than 4% to touch $78.82 a barrel in early Monday trading, their highest level since June 22, after US and Iranian forces exchanged a fresh wave of attacks over the weekend in a confrontation that has placed the fragile June memorandum of understanding on ending the conflict under severe stress. US West Texas Intermediate futures gained 2.5% to $73.24 a barrel. Both benchmarks had recently retreated to near pre-war levels as a result of early June diplomatic progress, making Monday's re-escalation particularly striking for energy markets that had begun pricing in a normalized supply picture.
US Central Command confirmed Sunday that American forces carried out dozens of strikes on Iranian targets, including anti-ship missile capabilities, small boats, coastal radar sites, and air defense systems near the Strait of Hormuz, citing Iranian attacks on two commercial vessels in the waterway over the preceding days. Iran responded by launching missiles and drones targeting US military facilities in Bahrain, Kuwait, Jordan, Oman, and Qatar, according to Iranian state media. The US military said it used one-way attack sea drones for the first time in the exchange, a tactical development that analysts said signals an escalation in the sophistication of US offensive options in the confined maritime theater.
The critical dispute centers on the legal and physical status of the strait itself. Iran's Persian Gulf Strait Authority declared the waterway closed to vessels not using its preferred routing procedures, a statement the US flatly rejected, with Central Command insisting freedom of navigation was being preserved and maintained. Oman has simultaneously been in talks with Iran about establishing a new maritime security framework that could involve transit management fees, an approach that maritime legal experts said sits in a gray zone under international transit passage principles, which generally do not permit states to charge vessels for passing through straits used for international navigation.
Maritime intelligence data from platform Windward confirmed the near-total freeze in commercial transit: just six vessels were tracked crossing the strait in a 12-hour window, compared with 18 to 22 daily crossings recorded earlier in July when the peace framework appeared to be holding. That collapse in commercial shipping flow reignites supply disruption fears that had largely been unwound from energy prices over the prior two weeks, and market analysts said the re-escalation is likely to keep Brent anchored in the upper $70s range even if the fighting subsides further.
Fabien Yip, a market analyst at IG in Sydney, said the weekend events exposed how optimistic the oil market's assumption had been when pricing in a best-case ceasefire scenario in June. Saul Kavonic at MST Financial projected that passage through the strait could remain below 50% of pre-war levels for months, with periodic flare-ups in hostilities continuing to add volatility. The inflation implications of this re-escalation are being absorbed by bond markets, with the 10-year Treasury yield pushing back toward 4.56%, complicating the Federal Reserve's already delicate inflation management calculus ahead of this week's critical CPI and PPI prints.
Energy sector stocks are positioned to recover from their recent underperformance as crude oil risk premium rebuilds, while airlines and other fuel-intensive industries that had begun to price in lower jet fuel costs face a reversal of that thesis. The conflict's trajectory also carries direct read-through for the Federal Reserve's testimony before Congress this week, as lawmakers are expected to press Fed Chair Kevin Warsh on how sustained energy price volatility is shaping the committee's inflation outlook and rate path.