Oil Prices Rise on U.S.-Iran Tensions; Stocks Muted

Oil prices rose sharply on Sept. 1–2 as U.S. strikes and Iranian missile and drone attacks around the Strait of Hormuz pushed benchmarks higher, tempering otherwise muted U.S. stock gains even after a federal court ruled in favor of Alphabet.

Oil Rally and Strait of Hormuz Supply Risk

On Sept. 1, U.S. Central Command (CENTCOM) said U.S. forces struck Islamic Revolutionary Guard Corps (IRGC) targets, including air-defense sites, radar systems, maritime assets, mine-laying capabilities, and communications sites. These strikes followed attempted attacks on commercial shipping and U.S. service members in the Strait of Hormuz. CENTCOM also noted earlier limited strikes on IRGC rocket launchers preparing to lay sea mines.

Iran responded with missile and drone attacks targeting U.S. positions and allied facilities in Jordan, Kuwait, Bahrain, and the United Arab Emirates, according to Iranian media and officials. The IRGC claimed the U.S. attacks would further restrict traffic through the Strait of Hormuz and asserted it had effectively closed the waterway to commercial shipping, a chokepoint that previously carried about one-fifth of global oil consumption.

Iranian officials alleged a U.S. strike in southern Iran hit a wedding party, causing at least four deaths and dozens of injuries. CENTCOM said it was reviewing the reports and reiterated that U.S. forces do not target civilians.

Brent and West Texas Intermediate (WTI) crude benchmarks each rose roughly $4 per barrel on Sept. 1 and gained nearly 1% on Sept. 2, marking the largest single-day surge for both since late July. Traders linked the rally to U.S. airstrikes and Iranian retaliation, including attacks on tankers leaving the strait and strikes on U.S. positions, intensifying fears of supply disruption and reviving inflation concerns.

The U.S. Energy Secretary reported that 17 million barrels transited the Strait of Hormuz on Aug. 31, the highest throughput since war-related reductions, underscoring the route’s ongoing role in global oil flows.

Market commentary connected the rally to renewed supply-disruption fears and rising inflation expectations that could complicate central-bank policy. Some analysts noted these skirmishes have historically been limited and non-escalatory, with short-term price moves depending on whether Persian Gulf flows are materially impaired.

Stocks Muted as Alphabet Wins Antitrust Ruling

Global and U.S. stocks entered the week under pressure from a global bond selloff and rising yields. The U.S. 10-year Treasury yield approached 4.8% before easing, which kept stock gains restrained despite signs of returning risk appetite.

On Sept. 2, Judge Leonie Brinkema of the U.S. District Court for the Eastern District of Virginia rejected the Justice Department’s request to force Alphabet to divest its AdX advertising exchange. The court declined a structural breakup and instead ordered behavioral remedies to make Alphabet’s ad-tech tools interoperable with rivals. Detailed remedial terms will be set out in a longer opinion expected in the coming weeks.

The ruling removed an immediate structural threat to Alphabet while imposing operational changes that could affect competitive dynamics in online advertising. Secondary commentary noted a high share of S&P 500 companies posted positive earnings surprises in the latest reporting season, partly attributed to AI-driven revenue gains. This supported a constructive near-term outlook for U.S. equities despite oil and yield risks.

The court’s forthcoming remedial opinion will specify the behavioral requirements, with time allotted for redactions before public release. No new Securities and Exchange Commission filings or Federal Reserve policy statements directly tied to these market moves appeared within the 72-hour window covered by reports.