Wall Street looked set for another rout on Monday as alarm bells rang across world markets following a more-than 8 percent drop in Chinese shares and a steep fall in prices of oil and other commodities.
The S&P 500 and Nasdaq composite indexes were poised to slip into correction territory, or 10 percent off their 52-week highs. The Dow Jones industrial average and the Nasdaq100 slid into a correction zone on Friday.
The Dow was set to open below 16,000 for the first time since February 2014.
The lack of new measures from Beijing to support Chinese stocks following an 11 percent drop last week sparked a free-fall in global equities and a selloff in oil and commodities.
Oil fell more than 4 percent to a 6-1/2-year low, while London copper and aluminum futures hit their lowest since 2009.
"Until we have some sign that China and the emerging markets aren't being sucked into some vortex from which they can't recover ... it is unlikely this selloff will stem," said Mark Luschini, chief investment strategist at Janney Montgomery Scott in Philadelphia.
The dollar index .DXY fell 1.1 percent to $93.92 as the probability of a September rate hike receded.
S&P 500 e-minis ESc1 were down 76.75 points, or 3.89 percent, with 1,007,394 contracts traded at 8:08 a.m. ET.
Nasdaq 100 e-minis NQc1 were down 208.5 points, or 4.96 percent, on volume of 131,513 contracts.
Dow e-minis 1YMc1 were down 685 points, or 4.16 percent, with 124,196 contracts changing hands.
Wall Street's selloff last week showed investors are becoming increasingly nervous about paying high prices for stocks at a time of minimal earnings growth, tumbling energy prices, and an expected rate hike by the U.S. Federal Reserve.
European stocks .FTEU3 were down 4.5 percent, wiping out more than 400 billion euros ($460 billion) of market value. Asian stocks slumped to 3-year lows as the 3-month-long rout in Chinese equities threatened to get out of hand.
Apple (AAPL.O) shares slid 5.8 percent to $99.61 in premarket trading and were set to open at their lowest this year.
Netflix (NFLX.O) fell 12 percent to $91.50.
Alibaba (BABA.N) fell 8.9 percent to $63.99, well below its IPO price of $68, making it the second high-profile tech company to fall below its IPO price in the past week after Twitter (TWTR.N) on Thursday.