Barclays just issued the kind of note that makes energy traders spill their coffee: Brent crude could test $100 per barrel when markets open Monday. That would be a 37% spike from Friday’s close of $72.48. The trigger? The U.S.-Israel strikes on Iran over the weekend — and Iran’s response of attempting to close the Strait of Hormuz.
If you don’t follow oil markets, here’s why this matters to every investor on the planet. The Strait of Hormuz handles more than 14 million barrels of crude per day — roughly a third of all seaborne crude exports globally. China alone gets half its oil imports through that chokepoint. Iran is OPEC’s fourth-largest producer at over 3 million barrels per day, and reports indicate Tehran is already ordering ships to stay out of the strait. Tankers have been observed diverting routes in real time.
“This is the real deal,” said Bob McNally, former White House energy advisor and founder of Rapidan Energy. He expects prices to pop $5 to $7 per barrel at Sunday’s open just on risk repricing — before anyone even knows how long the conflict lasts. Goldman Sachs has modeled a worst-case where Brent hits $110 if the strait stays closed for an extended period. McNally went further: “A prolonged closure of the Strait of Hormuz is a guaranteed global recession.”
The math gets ugly fast. The world’s spare oil capacity sits in Gulf states whose exports would be sealed off by a Hormuz closure. About 20% of global liquefied natural gas exports — mostly from Qatar — flow through the same bottleneck. There’s no backup route for most of it. Saudi Arabia has a pipeline to its western coast and the UAE has one to the Gulf of Oman, but those handle a fraction of normal traffic. McNally warns of “the mother of all bidding wars” as Asian importers hoard supply.
The U.S. Strategic Petroleum Reserve has about 415 million barrels — a buffer, but not a solution if this drags on. “In supply crises, duration matters. Scale does, too,” noted Kevin Book of ClearView Energy Partners. A full Hormuz crisis could outstrip what strategic reserves from the entire IEA membership can offset.
Brent was already up 20% year-to-date before the weekend strikes. Energy stocks have been quietly ripping — the iShares Global Energy ETF is up 24% in 2026. Defense stocks, already surging 14% this year, could see another leg higher. Meanwhile, gold — already above $5,000 an ounce — has a fresh catalyst. The playbook says risk-off: buy Treasurys, buy gold, sell growth.
But here’s the contrarian take from market veteran Ed Yardeni: “We wouldn’t be surprised if any selloff in the S&P 500 on Monday morning turns into a rally.” Geopolitical shocks are often short-lived for equities. Barclays, however, warns against buying any immediate dip — saying the risk-reward isn’t compelling until the S&P drops at least 10%. Monday morning is going to be violent either way. Make sure you know where your energy exposure is before the bell rings.