Monday, September 7, 2026 Closing bell

Oil nears $100 while Wall Street sits out

What happened

US stock and bond markets were closed all day for Labor Day, so there is no American close to report. The action was overseas, and it was mostly about oil: Brent crude settled at $97.13 a barrel, up 0.9% and the highest since July 24, after the US struck three Iranian oil tankers over the weekend and Iran fired ballistic missiles at American warships. Asia went its own way, with South Korea's Kospi jumping 4.6% to 6,995.40 and Japan's Nikkei 225 rising 2.1% to 66,399.84 on a chipmaker rally, while Europe's STOXX 600 closed flat at 649.9 and Hong Kong's Hang Seng slipped 0.8%.

Why it happened

Start with oil, because it is driving almost everything else. The Strait of Hormuz is a narrow sea passage at the mouth of the Persian Gulf that a large share of the world's seaborne oil has to squeeze through, and over the past ten days an average of only ten commodity ships a day have made the trip, the lowest count since May. Almost no oil has actually failed to reach a buyer yet. What changed is the odds. When traders believe supply might be cut off next month, they bid up the price today, because a barrel you already hold is worth more if barrels are about to become hard to get. Goldman Sachs has said prices could reach $120 a barrel if attacks on shipping intensify, and a forecast like that is itself part of what moves the price now.

That flows straight into interest rates. Oil is an input to nearly everything that gets made or moved, so when it rises, measured inflation follows a few weeks later. Investors who expect higher inflation sell government bonds, which pushes bond yields up, and that is what happened worldwide last week. The European Central Bank is now widely expected to raise its policy rate by 25 basis points on Thursday, a basis point being one hundredth of a percentage point, so 25 of them is a quarter of a point.

The Asian chip rally was a separate story with nothing to do with oil. Samsung Electronics rose 5.3% and SK Hynix rose 8.1%, and between them those two companies make roughly 64% of the world's DRAM, the ordinary working memory that sits inside every phone, laptop and AI server. Industry-wide DRAM revenue grew 59.5% in the second quarter compared with the first, because AI data centers are buying memory faster than the factories can produce it, and contract prices for next quarter are expected to rise another 13% to 18%. A shortage is very good news for whoever sells the scarce thing, which is why those shares jumped.

What it means for you

The pump is where this reaches you first. The national average for regular gasoline is about $4.15 a gallon, up from $4.08 a week ago and $3.20 this time last year. Crude takes a few weeks to move through refineries and into station prices, so today's $97 Brent is next month's pump price rather than today's. If you drive a lot, that is a real and still growing line in your budget.

The second effect is slower and easier to miss. Memory chips getting 13% to 18% more expensive means laptops, phones and anything else with a screen will likely cost more six to twelve months from now, because manufacturers pass higher component costs through with a long lag.

On mortgages and savings, the honest answer is that nothing changed today, but the direction is worth noticing. Higher oil feeds higher inflation, higher inflation makes central banks less willing to cut interest rates, and rates that stay high keep mortgage costs elevated while continuing to pay you better on savings accounts and CDs. The number that settles this argument is Friday's US consumer price report for August, due at 8:30am Eastern on September 11, followed by the Federal Reserve's meeting on September 15 and 16. If you have been waiting for cheaper mortgage rates, Friday is the day to watch.