US futures extend losses on the back of global selloff By: CNBC.com News February 05, 2018 at 05:40 AM EST U.S. stock index futures posted sharp declines ahead of Monday's open, extending losses from the previous session on Wall Street. Read More >> Related Stocks: Dow Industrials SPDR PowerShares QQQ S&P 500 Ishares Core ETF SPDR S&P 500 ETF Trust