Stocks Slide in Worst Week Since October Last Updated This briefing has ended. Follow our latest coverage of For weeks, as the stock market regularly climbed to records, investors wondered what it would take to snap Wall Street out of its blissful state. The resurgent pandemic certainly wasn’t doing it. Even an insurrection at the U.S. Capitol wasn’t alarming enough to end the rally. GameStop, though? On Friday, the S&P 500 fell more than 1.9 percent, capping a stretch of volatile trading that left the index down more than 3 percent for the week — its worst week since late October.