Wall St ends near lows

U.S. stocks closed sharply lower in volatile trading overnight, with the Dow and S&P 500 ending
their 4-day rally amid concerns over U.S. debt ceiling impasse. 
Dow Jones Industrial Average closed down 133.25 points to end at 15,168.01.
S&P 500 fell 12.08 points to 1,698.06.
All key S&P sectors ended lower, dragged by consumer discretionary and utilities shares.
Nasdaq slipped 21.26 points to 3,794.01.