 "Wall Street dips as UK vote, James Comey testimony loom")
US stocks opened lower on Tuesday as investors turned risk averse ahead of British elections and former FBI Director James Comey's much-anticipated testimony before Congress later this week.
The Dow Jones Industrial Average fell 52.77 points, or 0.25 per cent, to 21,131.27. The S&P 500 lost 6.48 points, or 0.26 per cent, to 2,429.62. The Nasdaq Composite dropped 14.11 points, or 0.22 per cent, to 6,281.57.