U.S. stocks drifted lower on Monday to compound their sharp losses from last week. The S&P 500 dipped 0.5% after flipping between small gains and losses several times through the day. The relatively modest moves followed its 1.

Wall Street was sluggish in the early going Tuesday as geopolitical concerns and President Donald Trump's trade policies weighed on markets. Futures for the S&P 500 and the Dow Jones Industrial Average are virtually unchanged before the opening bell.