Nasdaq falls 3.9% as tech sell-off deepens

US stocks tumbled on Thursday, wiping out the previous session's gains as investors continued selling technology shares. The Nasdaq Composite fell 3.9%, entering correction territory after dropping over 10% from last month's record, while the S&P 500 declined 2.8%. The Dow Jones Industrial Average shed 1,153 points, or 2.2%, erasing most of Wednesday's rally.