Wall St ends down on Greece concerns

U.S. shares closed down for for fifth day after Fitch Rating agency took negative action on Greece's ratings and following several gloomy economic reports.
The Dow Jones Industrial Average fell 156.06 points, or 1.24 per cent to 12,442.49.

The S&P 500 dropped 19.94 points, or 1.51 per cent to 1,304.86.

Most key S&P sectors closed in negative territory,led by consumer discretionary, while telecoms gained.

Nasdaq plunged 60.35 points, or 2.10 percent, to close at 2,813.69.