Among exchange traded funds, the Invesco QQQ TrustQQQ dropped 0.2%. The SPDR S&P 500 ETFSPY was down 0.3% ahead of the market open. The price of bitcoin briefly topped $122,000 before paring gains and trading around $121,800 in morning action.

Dow Jones Industrial Average futures were last down about 140 points, or 0.3 percent, after falling over 200 points overnight. Futures tied to the S&P 500 and Nasdaq 100 also slipped 0.3 percent each