US stock market today: Why Dow Jones falls while S&P 500 and Nasdaq climb as Nvidia, Oracle and Intel gain on oil retreat

US stock market today: U.S. stock market opened with a split. The Dow Jones Industrial Average slipped, while the S&P 500 and Nasdaq Composite held slightly above the previous close.

At around 10:55 a.m. EDT, the Dow stood at 51,314.41, down 167.10 points, or 0.32%. The S&P 500 was at 7,685.22, up 1.29 points, while the Nasdaq Composite gained 66.47 points, or 0.25%.

Oil prices have started to retreat, Treasury yields remain elevated and a new consumer-confidence reading has weakened sharply. Those forces are pulling investors in different directions.

U.S. stocks are sending mixed signals as oil falls, consumer confidence drops and investors reassess the economy

One reason is the reversal in oil prices. West Texas Intermediate crude was down 2.2% at about $90.71 a barrel, while Brent crude was around $103.97 after falling more than 1%. The move matters because higher energy prices can feed into inflation and put additional pressure on consumers and businesses.

Oil had been one of the market's biggest concerns in recent sessions. The Dow lost more than 300 points Monday, while the S&P 500 and Nasdaq Composite fell 0.8% and 0.9%, respectively.

The decline in crude therefore gives investors some relief, even though oil remains far above levels that would normally be considered comfortable for markets.

The pullback also came as reports pointed to separate indirect contacts involving U.S. and Iranian officials and mediators. Those discussions were described as part of efforts to end the seven-month conflict.

What is happening beneath the headline market indexes?

Nvidia was among the strongest actively traded names, rising 1.11% to $231.40. Amazon gained 0.30%. Boeing advanced 2.61%, while McDonald's rose 0.98%.

At the other end, Walmart fell 2.79% to $105.70. Apple dropped 1.72% to $332.57, and Johnson & Johnson declined 1.81%.

The sector data shows a similar split.

Dow Jones technology stocks were up 0.45%, while telecommunications gained 0.70%. The Philadelphia Semiconductor Index was considerably stronger, rising 2.27%.

Healthcare stocks, by contrast, were down 1.05%. Dow Jones oil and gas stocks fell 0.93%, and the Nasdaq insurance index dropped 1.78%.

Why do Treasury yields matter so much right now?

The bond market remains one of the biggest constraints on equities. The 10-year Treasury yield was around 5.259% at 10:55 a.m. EDT, up about 2 basis points. The 30-year yield was around 5.589%.

Those are significant borrowing costs for an economy that depends heavily on credit.

Higher Treasury yields can make bonds more attractive relative to stocks. They can also raise financing costs for companies, mortgages for households and borrowing expenses across the economy.

The 10-year yield is also trading around levels not seen since 2007, while the 30-year yield remains close to a level last seen around 2004, according to the market commentary provided.

What does the consumer confidence drop tell investors?

The day's most important economic data may have come from households rather than Wall Street. The Conference Board said its consumer confidence index fell 6.7 points in September to 81.9. Economists surveyed by Dow Jones had expected the index to rise to 89 from August's 88.6.

The decline was not simply about how consumers feel today.

Households still expected their incomes to rise, but that expectation also weakened.

Why is the market still willing to buy technology stocks?

Technology shares are benefiting from a different set of expectations. Nvidia gained more than 1%, while the broader semiconductor index climbed 2.27%. The Nasdaq also remained positive even as several major consumer and healthcare companies declined.

The contrast suggests investors are still willing to put money into areas tied to technology and artificial intelligence despite broader concerns about economic conditions.

At the same time, the day's moves show that enthusiasm is selective. Apple and several defensive or consumer-facing companies were under pressure.

Three numbers now sit unusually close together: oil prices, Treasury yields and consumer confidence.

A sustained decline in crude could ease some inflation pressure. A continued rise in long-term Treasury yields could work in the opposite direction by increasing financing costs. A further deterioration in consumer confidence would add another warning signal about household demand.