Wall Street opens lower on Greece impasse

Also fears are mounting about an economic slowdown in China.

US stocks fell on Monday, tracking global equity markets lower as a political impasse in Greece heightened concerns about Europe's debt crisis and fears mounted about an economic slowdown in China.

The Dow Jones industrial average was down 96.64 points, or 0.75%t, at 12,723.96. The Standard & Poor's 500 Index was down 11.50 points, or 0.85%, at 1,341.89. The Nasdaq Composite Index was down 24.59 points, or 0.84%, at 2,909.23.