Stocks have their worst day since October as Big Tech sinks

In this photo provided by the New York Stock Exchange, trader Samantha Tavares, right, works with colleagues on the floor, Wednesday, Jan. 27, 2021. Stocks were broadly lower in afternoon trading Wednesday, as investors focus on the outlook for the economy and corporate profits amid a still-raging coronavirus pandemic. (Courtney Crow/New York Stock Exchange via AP)

Technology companies led a broad sell-off in stocks Wednesday, knocking more than 600 points off the Dow Jones Industrial Average and handing the market its worst day in nearly three months.