Marvell (MRVL) stock has been surging on news that it will be added to the S&P 500 (^GSPC) on Jun. 22. Yahoo Finance Markets and Data Editor Jared Blikre takes a look at how stocks have historically performed in the days leading up to and following index addition.

Tech stocks tumbled on Friday, with semiconductor stocks leading the sell-off after a blistering run-up to record highs in recent weeks.

The excitement around the next iPhone cycle is already building, and this time it’s not just about faster cameras or sleeker designs. Apple (AAPL) is expected to step into the foldable arena as early as September, alongside a redesigned glass-heavy ...

With AI-induced layoffs mounting, political upheaval and a U.S.-Iran negotiating stalemate, stocks may be in for a shock.