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.

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

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.

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 ...

Amazon shares lost ground in extended trading on Thursday after the tech giant reported cloud computing revenue below expectations and issued a tepid current quarter outlook. Monitor these key ...

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 ...

Palantir shares jumped 23% in extended trading Monday after the analytics software company’s fourth-quarter revenue and 2025 outlook sailed past Wall Street expectations amid robust demand for its AI ...

This AI-driven approach goes beyond traditional voice analysis methods by detecting nuanced vocal characteristics ...

Arm Holdings reported fiscal third-quarter results that topped Wall Street estimates and raised the midpoint of its narrowed sales outlook. ...