The stock market is open for business between 9:30 a.m. and 4 p.m. Monday to Friday. Billions of shares are traded in the American markets, making them very liquid and efficient.

Tuesday’s session followed a start to the week that marked Nvidia’s worst day in years, as a roughly 17% drop led to a loss ...

Atlassian shares jumped 20% in extended trading Thursday after the software company issued an upbeat revenue outlook amid robust demand for its AI-powered cloud offerings. Monitor theses important ...

The S&P 500 declined by 0.5% on Friday, Jan. 31, as investors digested the White House’s proposed tariffs on Canada, China, and Mexico.

Shares of Super Micro Computer surged for a second straight session after it said it would give a second-quarter business update next week.

U.S. stock futures are little changed as markets digest trade policy changes, China sets retaliatory import taxes on some U.S ...

Nvidia shares plunged Monday amid concerns that a powerful, cost-efficient AI model developed by Chinese startup DeepSeek ...

Microsoft reported fiscal second-quarter Intelligent Cloud revenue that missed analysts’ expectations, dragging shares lower after the bell Wednesday.

Key Takeaways U.S. Steel shares gained ground after President Trump on Sunday flagged new 25% tariffs on all steel and ...

The S&P 500 gained 0.4% on Wednesday, Feb. 5, recovering from morning losses as chip giant Nvidia and other AI names reinvigorated the tech sector.

The S&P 500 edged 0.4% higher on Thursday, Feb. 6, as investors responded to the latest earnings results and awaited Friday morning's employment data.