After years of record highs on Wall Street powered by a narrow group of megacap tech leaders, 2026 begins with that base starting to crack.

Major indexes have mostly been treading water for months, as investors’ exuberance for artificial intelligence wears off.

Follow all the latest U.S. market action for Friday here as stocks rally following the Supreme Court's decision to strike down President Trump's emergency tariffs.

By Lewis Krauskopf NEW YORK, Feb 20 (Reuters) - Investors turn to financial results from artificial intelligence bellwether Nvidia Corp in the coming week to steady a U.S. stock market that has been rocked by AI-related worries.

Traders will be watching for a gross domestic product reading, a key inflation report and a potential Supreme Court ruling on tariffs.

This fund has an unusual approach for setting its portfolio of stocks once a year and letting it ride.

Kosmos Energy rallied after Ghana extended its key offshore licenses through 2040 and the company outlined a 20-well drilling expansion.

Presidents Day, also known as Washington's Birthday, is a federal holiday. Are U.S. stock markets closed today?

Also in Weekend Reads: Reactions to the Supreme Court ruling against Trump’s tariffs, AI and your taxes, and a deeper look into business-development companies.