The combined decline of U.S. stocks, bonds and the dollar could be a sign of a broader shift away from investing in America.

The dollar continued to slide against major currencies on Friday as the back-and-forth over import tariffs shook investor confidence in the safety of the greenback, sending it to its lowest level in a decade against the Swiss franc and a three-year low versus the euro.

Global investors are questioning the safe-haven status of U.S. assets in the wake of President Donald Trump's multi-trillion dollar tariff gambit, with the dollar slumping to the lowest level in three years amid a rare decline that parallels the worst slump for long-dated Treasury bonds in more than four decades.