Stocks saw mixed performances on Monday.
In the US, the S&P 500 gave up early gains to finish down 0.3 percent.
Elsewhere, the STOXX Europe rose 0.3 percent, the Shanghai Composite jumped 1.6 percent but the Nikkei 225 fell 0.4 percent.
Investors in the US are “a little nervous”, according to Tom Carter, managing director at JonesTrading.
“The corporate earnings outlook is low to flat,” said Oliver Pursche, chief executive at Bruderman & Co.
Indeed, analysts at Goldman Sachs said recently: “Near-term risk is skewed to the downside."