Costco stock price steadies after hours as tariff threat rattles markets
New York, January 20, 2026, 18:23 EST — After-hours Costco Wholesale Corporation shares ticked up 0.1% to $964.26 in after-hours trading Tuesday. The stock swung between $954.23 and $969.86 during the session, with roughly 3.2 million shares changing hands. Costco remained steady as Wall Street suffered its largest one-day drop in three months. The S&P 500 slipped 2.06%, while the…