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 imports into the United States. Monitor these crucial chart levels.

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 ...

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.

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 ...

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 ...

Cloudflare shares traded sharply higher on Friday after its fourth-quarter earnings topped analyst expectations. Monitor ...

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

The S&P 500 fell 0.8% on Monday, Feb. 3, as investors reacted to tariffs on major U.S. trading partners while awaiting key earnings and labor market data.

The S&P 500 slipped 1.0% on Friday, Feb. 7, as the latest labor market data revealed that the U.S. economy added fewer jobs than expected in January.