The ramifications of Chinese startup DeepSeek, with its promise of delivering cheaper, more energy-efficient alternatives to harness artificial intelligence, have yet to be fully reflected in U.S ...

The S&P 500’s technology sector just ended its worst week since early September, after Chinese artificial-intelligence company DeepSeek seemed to startle investors’ perception of winners and ...

Despite all the fireworks on Monday, including a 17% decline for Nvidia’s stock, the S&P 500 index ended January with a 2.8% gain and 72% of its stocks were up for the month. Following are lists ...

Tesla's post-results call with analysts has started, and MarketWatch will live-blog it. Chief Executive Elon Musk is on the call. Earlier Wednesday, the EV maker reported fourth-quarter earnings ...

U.S. stocks tumbled on Friday after a blockbuster December jobs report. At first blush, to some investors, that reaction might seem surprising. The labor market is expanding at its fastest pace ...

And that’s not about electric cars. Tomi Kilgore is MarketWatch's deputy investing and corporate news editor and is based in New York. You can follow him on Twitter @TomiKilgore.

The blue-chip Dow Jonest Industrial Average closed lower on Thursday, but stocks still were on pace to post weekly gains as a chaotic week on the tariff front was winding down. The Dow lost 125.65 ...

Wall Street had a message for investors on Monday: Buckle up, because you could be in for a bumpy ride. Investors got another taste of volatility as President Donald Trump’s planned tariffs on ...

Shares of Walgreens Boots Alliance Inc. sank on Friday after the U.S. Justice Department sued the drugstore chain, alleging that for years it “knowingly” filled millions of prescriptions ...

Tesla scheduled a post-results call with analysts for 5:30 p.m. Eastern. MarketWatch will live-blog the call.

S&P 500 companies that are not part of the "Magnificent Seven" are on pace to outperform in January. (MLADEN ANTONOV/AFP via Getty Images) It's been a mixed start to the year for megacap tech ...

The surprising strength of the U.S. jobs market and the stickiness of inflation have led economists to mull what was once unthinkable — a possible interest rate rise by the Federal Reserve this ...