US shares have halted their slide after the president of Mexico said she had reached a deal with US President Donald Trump to suspend tariffs on the country's goods.
Mr Trump had said a 25% import tax on goods from Mexico would begin on Tuesday, along with tariffs on goods from Canada and China.
But it has now been delayed for a month.
After opening down more than 1%, the three major indexes in the US regained some ground, with the Dow Jones Industrial Average off about 0.3%.
Investors are bracing for a turbulent period that could hit the earnings of major companies and dent global growth.
The US dollar strengthened on the currency markets amid the uncertainty, rising to a record high against China's yuan, while the Canadian dollar plunged to its lowest level since 2003.
Earlier, concerns about the tariffs had hit shares in Asia and Europe.