July 14 (Reuters) - Wall Street's main indexes opened

mixed on Monday as investors digested President Donald Trump's

latest tariff threats against the EU and Mexico, in a week

loaded with economic data and the start of second-quarter

earnings.

At 9:31 a.m. ET, the Dow Jones Industrial Average

fell 126.24 points, or 0.28%, to 44,245.27, the S&P 500

lost 6.11 points, or 0.10%, to 6,253.64 and the Nasdaq Composite

gained 27.83 points, or 0.14%, to 20,613.36.

(Reporting by Pranav Kashyap in Bangalore)