Stocks slide further on global economic worries

Stock traders work at the New York Stock Exchange, Thursday, Feb. 11, 2016, in New York. (AP Photo/Mark Lennihan)
photo FILE - This July 15, 2013, file photo, shows a sign for Wall Street outside the New York Stock Exchange. Global markets shuddered again Thursday, Feb. 11, 2016, with bank stocks in particular getting hammered, oil falling further and investors turning to perceived safe havens like gold. (AP Photo/Mark Lennihan, File)

Jitters over the global economy and steep declines in bank stocks knocked U.S. stocks lower for the fourth day in a row Thursday.

The slide in the U.S. followed large losses all around the world and left all three major U.S. indexes down at least 10 percent since the beginning of the year.

The latest slump reflected heightened concerns that global economic growth is slowing, even as Federal Reserve Chairwoman Janet Yellen reiterated her confidence in the U.S.