Uber's bruised investors have had the weekend to prep for what looks like a rough Monday for markets, partly because the escalation of President Donald Trump's tariff spat with China is set to hammer sentiment.

Shares of Uber Technologies Inc. resume trading Monday 7.6 percent below their offering price after Friday's flop. Among the factors that buffeted the biggest IPO of the year: a broad stock market selloff in the morning and a weak earnings report posted by Uber's primary rival, Lyft Inc.

Uber opened at $42, or 6.7 percent below its $45 IPO price. Shortly after, it slid to $41.06. While the company briefly reclaimed almost all its losses by early afternoon, the comeback proved short-lived.