The Strait of Hormuz Is Effectively Closed and Your Gas Bill Is About to Jump

The Numbers That Matter

On a normal day, about 10.3 million deadweight tonnes of vessel traffic passes through the Strait of Hormuz. On Sunday, March 1, that figure was just over 1 million. That's an 81% collapse in shipping traffic, the worst disruption in the strait's history. Over 150 tankers are currently anchored outside the strait, waiting. Danish shipping giant Maersk has suspended all vessel crossings "until further notice." And at least three tankers have been attacked near the strait, including one off Oman's coast that was set ablaze.

This isn't a theoretical risk scenario. This is happening right now, and the global economy is already feeling it.

What the Strait of Hormuz Actually Means

For anyone who hasn't spent time staring at oil trade maps, here's the short version: the Strait of Hormuz is a 21-mile-wide waterway between Iran and Oman, and roughly 20% of the world's daily oil supply passes through it. Saudi Arabia, Iraq, the UAE, Kuwait, and Qatar all rely on the strait to export their crude. The strait also carries a significant share of global liquefied natural gas (LNG) shipments.

When the strait is open, the global energy market functions normally. When it's not, everything breaks. Rystad Energy's chief economist, Claudio Galimberti, put it simply: "We have not seen anything like this in pretty much the history of the Strait of Hormuz." The 1980s Tanker War came close, but even then the disruption wasn't this severe or this sudden.

Iran's position has been characteristically ambiguous. An IRGC commander declared the strait "closed" and vowed to "set any ship trying to pass through on fire." Hours later, Iran's foreign minister said the country has "no intention of closing the Strait of Hormuz at present." The mixed signals are deliberate: Iran is maintaining enough ambiguity to deter shipping companies without triggering a formal blockade that would invite a direct U.S. Navy response.

Oil Prices: Where They Are and Where They Could Go

U.S. crude (WTI) rose 8.4% on Monday, closing at $72.74 per barrel. Brent crude, the global benchmark, jumped 9% to $79.45. At one point during Monday's session, prices spiked more than 12% before pulling back.

These are significant moves but not catastrophic yet. The real fear is what happens if the disruption continues. Barclays told clients on Saturday that Brent could hit $100 per barrel if the Hormuz situation escalates. Analysts across the board are pricing in a range of $80 to $100 as the new baseline if tanker traffic doesn't resume within the next week or two.

Saudi Arabia does have the East-West Pipeline to its Red Sea port of Yanbu, which bypasses Hormuz. But that pipeline handles only a fraction of total Saudi exports. For Iraq, the UAE, Kuwait, and Qatar, there is no alternative route. If Hormuz stays effectively closed, their oil simply doesn't reach the market.

Gas Prices: 10 to 30 Cents Higher by Next Week

For American consumers, the math is straightforward. The national average gas price was $2.98 per gallon before the strikes, the lowest since 2021. The rule of thumb is that retail gas moves about 2.5 cents for every $1 change in crude oil.

Patrick De Haan, head of petroleum analysis at GasBuddy, is projecting an average increase of 10 to 30 cents per gallon within the next week, with some individual stations seeing prices spike as much as 85 cents. That puts the national average somewhere between $3.08 and $3.28 in the near term, with potential for $3.50 or higher if oil pushes past $90.

The timing is particularly bad for consumers already dealing with an economy under pressure. PCE inflation is running at 3.0%, January PPI came in nearly triple expectations, and the effective tariff rate of 13.7% is already adding an estimated $800 to $1,300 per household per year. Tacking on higher energy costs doesn't just hurt wallets; it feeds into the inflation numbers that the Federal Reserve watches when deciding whether to cut rates.

The Stock Market Shrugged, Sort Of

Monday's stock market reaction was surprisingly muted. The S&P 500 fell as much as 1.2% intraday, with the Dow dropping nearly 600 points at its lows, before both indices clawed back. The S&P finished essentially flat, up 0.04%. The Dow lost a modest 73 points. Only four of the 11 S&P sectors ended positive: energy, industrials, tech, and real estate.

The bounce had less to do with optimism about Iran and more to do with historical pattern recognition. Past military conflicts, as a rule, have not produced sustained stock market declines. Investors bought the dip on the assumption that this conflict, like most before it, would be contained. Whether that assumption holds is another question entirely.

The bond market told a different story. Treasuries initially rallied on safe-haven demand (prices up, yields down), but then reversed as oil-driven inflation fears took over (prices down, yields up). That tension between "flight to safety" and "inflation panic" is the defining dynamic of this crisis. If yields keep rising because the market is pricing in sticky inflation, the Fed's rate-cutting timeline gets pushed out further, and the entire rate-sensitive part of the economy, housing, autos, consumer credit, stays under pressure.

The Fed Is in a Box

The Federal Reserve was already walking a tightrope. Inflation was cooling but not fast enough. The labor market was softening but not collapsing. Rate cuts were priced in for the second half of 2026. An oil shock changes that equation.

Higher oil prices feed directly into headline CPI. Every dollar that crude rises is a data point against cutting rates. But if the economy weakens under the combined pressure of tariffs, energy costs, and geopolitical uncertainty, the Fed will eventually have to choose between fighting inflation and supporting growth. That choice, if it comes, is the kind of thing that defines economic eras.

For now, watch three numbers this week: the ISM Manufacturing PMI (out today, Monday), the jobs report (Friday), and Brent crude's trajectory. If all three point in the same direction, downward growth, weakening employment, and rising oil, the word "stagflation" will start appearing in every financial headline. And the market's Monday calm will look, in hindsight, like the quiet before the storm.