Shares in Twitter jumped Thursday after the social media company said revenue and user numbers exceeded forecasts in the latest quarter, though profit fell as expenses rose.The San Francisco-based tech company said that fourth-quarter net income fell...

Stocks fell sharply on Wall Street Friday as fears spread through the markets that a virus outbreak emanating from China will dent global growth.The Dow Jones Industrial Average skidded more than 600 points and the S&P 500 index erased its gains for...