Major stock exchanges in the United States traded with losses at the open on Tuesday as the world braced for US President Donald Trump's tariffs coming tomorrow, with a media report claiming that the White House is considering a potential 20% import levy on most products.

The Dow Jones shed 0.38% or 158 points at the open, as Johnson & Johnson slid 3.66% at 9:31 am ET. At 9:30 am ET, the Nasdaq 100 lost 0.48%, with Fortinet down 1.34% a minute later. The S&P 500 started the session trading 0.36% lower, with Delta Air Lines slumping 4.43% at 9:32 am ET.

The euro traded 0.21% below the dollar at 9:29 am ET, changing hands for 1.07929.