Futures on the S&P 500 slipped 0.63% and futures on the Dow Jones Industrial Average fell 0.62%. Changes in equity futures do not necessarily predict market moves after the markets open.
In Europe, the Stoxx Europe 600 was down 0.83%, Unilever rose 0.63% and Diageo remained almost flat.
The U.K.'s FTSE 100 slipped 0.86%. Other stock indexes in Europe were similar as France's CAC 40 fell 0.3% and Germany's DAX slid 0.2%, whereas the U.K.'s FTSE 250 was 1.59% lower.
The British pound was down 0.8% against the dollar, with 1 pound buying $1.07. Meanwhile, the Swiss franc and the euro traded flat against the U.S. dollar.
In commodities, Brent crude declined 0.33% to $85.87 a barrel. Gold fell 0.48% at $1,647.60 a troy ounce.
VIX, VIXmain jumped over 8% and 3% separately.
German 10-year bund yields rose to 2.078% and the yield on U.K. 10-year gilts was up to 4.044%. 10-year U.S. Treasury yields were up to 3.759% from 3.695% on Friday. Bond yields move inversely to prices.
Indexes in Asia mostly fell as Hong Kong's Hang Seng lost 0.4%, Japan's Nikkei 225 index shed 2.7% and China's benchmark Shanghai Composite was 1.2% lower.