Major U.S. stock indexes extended losses Thursday after falling more than 2% on Wednesday. Investors have decided to take profits in the face of possible tax increases and fiscal cliff concerns.

The Dow Jones Industrial Average was down 50 points in recent trading. Those losses come a day after it dropped 313 points and finished Wednesday's session below 13,000, marking its largest daily decline in a year. The S&P 500 Index had its worst performance on Wednesday since June, falling 2.4% to 1394.53.