A bigger-than-expected slide in US manufacturing weighed on Wall Street, bolstering concern about a slowdown in the pace of expansion in the world's largest economy.
That fear was muted by expectations the US Federal Reserve will take action to help accelerate growth if needed.
The Institute for Supply Management said on Monday its index of national factory activity dropped to 49.7 in June from 53.5 in May. That fell short of expectations for the 52.0 reading predicted in a Reuters poll of economists and was below even the lowest forecast.
The reading marked the first time in almost three years that the index has fallen below the 50 mark that separates expansion from contraction.
"Clearly this is the biggest sign yet that the US is catching the slowdown that is well under way in Europe and China," Paul Dales, senior US economist at Capital Economics in London, told Reuters.