US Stocks-Wall St futures slip as chip stocks drag; Netflix tumbles

Thursday's chip stocks-led losses had already set a weaker tone. The main indexes were on track for weekly declines, despite an initially upbeat start to the second-quarter earnings season from major banks and benign inflation data earlier in the week.

Geopolitical risks also loomed large. Iran said it had launched fresh attacks on U.S. facilities in the Gulf after a sixth straight night of U.S. strikes on Iranian military targets.

The escalation followed the breakdown of a brittle ceasefire reached last month and renewed concerns over energy flows through the Strait of Hormuz, fanning price pressures.

"Undoubtedly, there'll be concerns that we are poised to see a much broader sell-off that will be amplified by what's going on with the U.S. and Iran," Chris Beauchamp, chief market analyst at IG, said.

Meanwhile, U.S. President Donald Trump's fresh accusations that China meddled in U.S. elections risked complicating a fragile truce with Chinese leader Xi Jinping, just two months before a planned summit in Washington.