Trump had said that he will delay tariffs on goods including laptops, cell phones, footwear and clothing to protect US shoppers "for the Christmas season," appearing to contradict his own assertions that China is paying the existing tariffs, not US consumers.
Trump said his decision came after "a very good call" with China and that the tariffs intended to kick in from Sept. 1 would be deferred until December 15. According to The Wall Street Journal, the backdown affects about US$156 billion ($241.6b) of the US$200b targeted for the new 10 per cent tariffs.
The move triggered a relief rally in US stocks as well as improving the appetite for the Australian and New Zealand dollars.
But data then showed China's industrial output in July was up 4.8 per cent year-on-year, a 17-year low and well below consensus forecasts for 6 per cent growth. Output had risen 6.3 per cent in June.
Other Chinese data was equally gloomy. Retail sales in July were up 7.6 per cent against expectations of an 8.6 per cent increase and down from 9.8 per cent in June.
China is the largest trading partner of both Australia and New Zealand, while Australia is New Zealand's second-largest.
"There was a bit of a sell-off in the Australian dollar and the kiwi dollar followed suit, but it was taken back soon after," says Imre Speizer, currency strategist at Westpac.
"The bigger story was the overnight trade war de-escalation," Speizer says.
Singapore-based VM Markets managing partner Stephen Innes says the reaction to Trump's back-down shows how starved financial markets are of good news.
"After being stuck in trade war purgatory and starved of positive news of late, any glimmer of optimism or agreement on practically anything on the trade war front is viewed favourably," Innes says.
The New Zealand dollar was trading at 95.05 Australian cents from 94.95, at 53.56 British pence from 53.50, at 57.79 euro cents from 57.75, at 68.81 yen from 68.83 and at 4.5310 Chinese yuan from 4.5433.
The New Zealand two-year swap rate edged up to a bid price of 0.9641 per cent from yesterday's close at 0.9570. The 10-year swap rate rose to 1.2900 per cent from 1.2675.