Wall Street drifted modestly lower before the opening bell as uncertainty over global trade seeps into the busiest week of earnings this quarter from major corporations, as well as a raft of economic indicators Futures for the S&P 500 dropped 0.

U.S. stocks are drifting at the start of a week with many potential flashpoints for markets including earnings reports and economic data

U.S. stocks are drifting Monday ahead of potential flashpoints looming later in the week that could bring more sharp swings for financial markets. The S&P 500 was virtually unchanged in morning trading,