Iran Blockade Returns: Oil at $79, Chevron, Exxon in Focus

President Donald Trump reimposed a naval blockade of Iran on July 14 after the latest ceasefire negotiation collapsed, the White House confirmed. The move restarts a cycle of supply disruptions through the Strait of Hormuz, a chokepoint that carries roughly 20% of the world's crude.

The blockade resumed following months of on-and-off conflict that began with the war in Iran on Feb. 28. Iran had cut off most access to the Strait, triggering sharp price spikes and a U.S. drawdown of strategic reserves. Those reserves are now at their lowest level since 1983, limiting the government's ability to cushion future shocks, the Energy Department reported.

Crude oil traded near $79 a barrel on Thursday, up from about $68 in early July but well below the $100-plus range seen in March through May. Analysts at Goldman Sachs said the blockade's duration will determine whether the current price holds. "If the blockade continues, $80 becomes the new floor," the bank wrote in a note.

Chevron and Exxon Mobil, the two largest U.S. oil majors, are positioned to benefit from the supply squeeze because their integrated models span extraction, refining, and retail sales. Chevron is investing in pipeline infrastructure designed to bypass the Strait, according to a company filing. The project predates the current conflict but has gained urgency since the war began.

Exxon reported second-quarter earnings that beat consensus on Tuesday, with upstream margins widening as crude prices stayed elevated. Chevron's results are due next week.

Investors should note that the geopolitical situation remains fluid. Trump said after a meeting with Iraq Prime Minister Ali al-Zaidi on July 14 that the U.S. would be "taking out a lot of oil" and that "the American companies are doing it." He offered no timeline for lifting the blockade.

For traders, the key variable is how long the Strait stays closed. A prolonged disruption would keep oil above $80 and lift shares of integrated producers. A swift resolution would likely erase the war premium, pulling crude back toward $70.

AlphaScala's proprietary scoring system rates Chevron at 52/100 (Mixed) and Exxon at 47/100 (Mixed), reflecting the sector's balanced risk-reward in the current environment. Both stocks are available for direct tracking on the NVDA stock page, though Nvidia is not directly affected by oil markets.

A broader way to play the theme is through energy ETFs. The Vanguard Energy ETF, with Chevron and Exxon making up 35% of its assets, offers diversification across oil-related industries. That fund has risen 12% year to date.