Two Records. 24-Year Yields. Then AI Cracked

Wall Street spent the week testing how much pressure this rally can take. Monday brought another AI surge. Tuesday sent both the S&P 500 and Nasdaq to record closes. Then the bond market hit back. The 10-year Treasury yield reached 5.364%, its highest level in about 24 years.

Mortgage rates jumped to 7.49%. Brent crude surged above $104. And by Thursday, chip stocks were down 3.4% as investors started asking harder questions about AI revenue. Then Friday morning brought another reversal.

Oil fell more than 1%. The 10-year steadied near 5.24%. Nasdaq futures rose 0.63%. Chip stocks pointed higher. The week started with records. Then rates, oil and AI profits took over.

Monday, October 5

Tuesday, October 6

Wednesday, October 7

Thursday, October 8

Friday morning, October 9

The week started with investors buying exactly what they have been buying all year. AI. Nvidia reached $5.76 trillion. Microsoft rose. Meta rose. Tesla rose. And the Nasdaq closed at another record. Oil helped too.

Brent fell toward $100. That took some pressure off inflation fears. The market had a simple Monday message. Fed risk was lower. Oil was lower. AI earnings expectations were still high. Buyers stepped in.

Tuesday was even stronger. The S&P 500 hit a record. The Nasdaq hit another record. And this time the rally spread. Ten of 11 major S&P sectors gained. AMD jumped 2.8%. Marvell surged 5.8%.

Constellation Energy gained 12.3% after a huge 3,590-megawatt power agreement tied to Alphabet. That deal showed how far the AI boom has spread. It is no longer just chips. AI now needs power. Data centers. Networks. Software. Cooling. And billions of dollars of new infrastructure. Tuesday was the market pricing that buildout.

Then came 5.364%. The 10-year Treasury yield reached its highest level in roughly 24 years. The 30-year hit about 5.67%. Mortgage rates jumped to 7.49%. That changed the mood quickly. Housing stocks dropped. Small caps fell. Chip stocks weakened.

The S&P 500 and Nasdaq both slipped. The key problem was not the next Fed meeting. October hike odds actually fell to 17.2%. The problem was long-term money. The Fed may pause. The bond market is still demanding much higher yields. That distinction became one of the biggest stories of the week.

A Treasury yield can feel distant. A 7.49% mortgage does not. That rate changes monthly payments. It cuts buying power. It makes homeowners with old low-rate mortgages less willing to move. And it hurts builders. Homebuilders fell about 2.9% Wednesday. The Russell 2000 dropped 1.3%. That is where the bond selloff moved from Wall Street into the real economy. Long rates are now high enough to directly hit housing and smaller companies.

Then oil returned. Brent jumped 4.1% to $104.28. WTI rose 3.6%. Middle East supply fears came back. Hurricane shutdowns cut Gulf output. And suddenly one of the market’s biggest inflation risks was moving higher again. That mattered because the Fed is already fighting prices above target. Oil above $104 makes that job harder. It also keeps the long-bond market nervous. But oil was only half of Thursday’s problem.

The bigger stock-market shock came from AI. A report said OpenAI’s annualized revenue was running below earlier signals. That changed the question investors were asking. For most of the year, the question was: How much will companies spend on AI?

Thursday, the question became: How much money will AI actually make? That is a much harder test. Chip stocks fell 3.4%. Nvidia lost about 2.9%. AMD fell nearly 4%. Micron dropped 4.8%. Broadcom fell 4.4%. Oracle lost 5.5%. The Nasdaq dropped 1.25%. The AI trade did not disappear. But investors started demanding proof.

Thursday produced one of the week’s most important signals. Treasury yields fell. Tech still sold off. The 10-year ended near 5.227%. Normally, lower yields help high-growth stocks.

Not Thursday. That tells us the selloff was not only about interest rates. It was about profit. AI stocks have been able to survive yields above 5% because investors expect enormous growth. If that growth gets questioned, falling yields alone cannot fix the problem. That was a new risk.

Friday brought some relief before the opening bell. Brent fell more than 1% to below $103. The move came as fears of an immediate escalation with Iran eased. The 10-year held near 5.24%. Nasdaq futures gained 0.63%. Nvidia rose about 1.5% premarket. Chip stocks pointed higher. The rebound matters.

Thursday’s AI selloff did not immediately become a larger liquidation. Buyers were already returning to semiconductors. That does not settle the AI debate. It shows investors are not ready to abandon it.

The entire week came down to a collision between two forces. Growth. And cost. AI spending remains huge. Corporate profits are expected to be strong. The S&P 500 hit a record Tuesday. But money is expensive. The 10-year is above 5%. Mortgage rates are near 7.5%. Oil is above $100. And companies need enormous amounts of capital to build AI infrastructure. The bull case is simple. Profits grow faster than financing costs. The risk is just as simple. They do not.

That question starts getting answers next week. JPMorgan. Goldman Sachs. Citigroup. Wells Fargo. Morgan Stanley. Bank of America. The big banks begin third-quarter earnings season. S&P 500 profits are expected to rise more than 30% from a year ago. That is an enormous hurdle. Then comes inflation.

September CPI is due Wednesday. Headline inflation is expected around 3.6%. Core inflation is expected near 2.5%. Those numbers could quickly change Fed expectations again. The market is near records. The 10-year is above 5%. That leaves little room for weak earnings or hot inflation.

This week left markets with a short list of numbers that matter:

This week started with records. Then the bond market hit 24-year highs. Mortgage rates reached 7.49%. Oil surged above $104. AI stocks finally cracked. Yet by Friday morning, buyers were already trying again.

That tells us exactly where the market stands. The bull market is still alive. The cost of keeping it alive is getting much higher. Stocks hit records. Yields hit 24-year highs. Next week, earnings have to justify both.