On Friday, Trump ratcheted up tensions ahead of the weekend's G7 meeting in Biarritz by calling on US companies to "immediately start looking for an alternative to China".
The statement triggered a sell-off that wiped 2.6 per cent from the US equity market as investors swapped stocks for safer assets such as government bonds.
Later on Friday, Trump said the US would increase tariffs to 30 per cent from 25 per cent for US$250 billion of Chinese goods from October 1 and boost a levy on an additional US$300b of Chinese imports that includes toys and clothes to 15 per cent from 10 per cent. This second group of tariffs is due to come into effect in two parts on September 1 and December 15.
On Monday, Trump changed tack again in remarks at the G7 conference, praising China for making an effort to restart trade negotiations.
His comments buoyed European markets and helped stem a sharp decline in Asia. US stocks, too, were trading about 1 per cent higher by lunchtime in New York, while the yield on the 10-year Treasury bond was flat at about 1.53 per cent.
UBS believes the tariff war will not trigger a full-scale recession in the US, because of central bank easing and healthy consumer spending, which accounts for roughly 70 per cent of the economy.
But other strategists agreed that the ongoing skirmishes in the trade war were making it more difficult to take a bullish stance on stocks, which continue to trade at historically expensive levels.
"Sentiment is so fragile right now," said Candice Bangsund, portfolio manager for Fiera Capital. "The market is trading off . . . every headline and that is driving the risk-off behaviour."
Written by: Richard Henderson
© Financial Times