Monday, September 28, 2026 Closing bell

Yields hit a 2007 high, stocks slip

What happened

US stocks closed lower on Monday, the first session of the week. The S&P 500 fell 0.77% to 7,683.69, the Dow Jones Industrial Average lost 346.90 points or 0.67% to 51,481.51, and the Nasdaq Composite dropped 0.92% to 26,820.38. The selling was broad rather than concentrated, with more than 65% of US issues finishing in the red, and the 10-year Treasury yield rose to 5.24%, its highest level since June 2007.

Why it happened

The chain started over the weekend, when President Trump rejected Iran's proposal to end the war and reopen the Strait of Hormuz, the narrow sea passage through which a large share of the world's oil is shipped. When traders decide that passage will stay closed or uncertain for longer, they bid up the price of oil, because the supply that would have flowed through it has to come from somewhere else. Brent crude, the global oil benchmark, rose toward $105 a barrel.

Oil is the input almost everything else is made and moved with, so a higher oil price feeds into the price of nearly every good in the economy a few months later. That is inflation, meaning a general rise in prices, and it is the one thing the Federal Reserve is charged with controlling. When investors expect more inflation, they expect the Fed to keep interest rates high or raise them further, so they refuse to lend the government money at the old rate. That refusal is what a rising yield actually is, and on Monday it carried the 10-year to 5.24% and the 30-year to about 5.55%.

Higher yields then work backwards into stock prices through two channels. Companies that borrow to grow face a higher cost of doing it, which shrinks future profits. And investors comparing a risky stock against a government bond now paying more than 5% demand a bigger discount on the stock, which means paying less today for profits a company might earn years from now. That is why the Nasdaq, which is heaviest in fast growing technology companies whose profits sit furthest in the future, fell more than the Dow, which is full of older businesses earning money now.

Two company stories cut across the day. Nvidia rose more than 2% after authorizing a record $150 billion share buyback. MongoDB fell about 20% after its chief executive left to join Meta Platforms, and Boeing dropped after the Federal Aviation Administration delayed certification of the 737 Max 10 over a software problem.

What it means for you

This is the day the bond move stopped being abstract. The average 30-year mortgage rate has climbed above 7% for the first time since January 2025, because mortgage rates are priced off the long-dated Treasury yield rather than off anything the Fed announces directly. If you are shopping for a house or waiting to refinance, the window narrowed today rather than widened.

The same move works in your favor on the saving side. Money in a high yield savings account, a certificate of deposit or a short-term Treasury is paying more than it has in nearly two decades, and that is worth acting on, because banks are slow to raise the rate on an old account and quick to advertise a new one. Check what yours actually pays.

On oil, expect it at the pump within a few weeks rather than tomorrow, since refiners and stations pass crude prices through with a lag. In your retirement account, a day like this shows up as a small dip and is not worth reacting to, but the pattern behind it is worth noticing, because an economy where the government pays over 5% to borrow is a different environment from the one most retirement math was built in.

The honest caveat is that this week is what decides whether Monday was noise. Inflation figures arrive Wednesday and the September jobs report on Friday, and both feed straight into whether yields keep climbing.