US Treasuries led a global rally in some of the world’s safest assets after President Donald Trump imposed a one-month deadline on China to agree a trade deal or risk tariffs on all of its exports. Yields on benchmark 10-year bonds touched the lowest level since March, correlating with a slide in the offshore yuan, widely seen as the key barometre of risk sentiment over trade. The yen rallied, building on a four-week run of gains, while European stocks fell. Traders meanwhile, boosted bets on a rate cut from the Federal Reserve this year. “I can’t see a real deal before the G20 summit in June,” said Ciaran O’Hagan, head of European rates strategy at Societe Generale in London. “The rally is more than justified. I am surprised that bonds are not rallying more.” The conflict between the world’s two biggest economies has taken a turn for the worse over the past week, with Mr Trump imposing another wave of tariffs on Chinese goods on Friday. That has increased fear in markets that any further escalation could seriously jeopardise the global economic recovery before many of the world’s central banks have had a chance to normalise monetary policy. The US told China it has a month to secure a trade deal or face tariffs on all its exports, ratcheting up pressure after it accused President Xi Jinping’s government of backpedaling on promises. China has said additional duties imposed should be removed for an agreement, setting the stage for weeks of uncertainty in financial markets after investors had thought a pact was near. “Markets have grown less optimistic about the US-China trade negotiations after some news reports from China’s state-run media suggested a harder stance," said Mayank Mishra, macro strategist at Standard Chartered Bank in Singapore. “The risk of protracted US-China trade tensions may weigh down USD/JPY in the short term.” Yields on 10-year Treasuries fell as much as five basis points to 2.41 per cent, the lowest level since March 29. The yen strengthened against all of its major peers, rising as much as 0.3 per cent to 109.60 against the dollar. Offshore yuan fell as much as 0.9 per cent to 6.91 per dollar, a 2019 low. S&P 500 futures dropped 1.3 per cent. The US hiked tariffs on more than $200 billion of Chinese goods on Friday, with the Asian nation vowing to retaliate. A week of tense stand-off before crucial talks in Washington led to the yen strengthening by 1 per cent. It touched ¥109.47 against the dollar on Thursday, its highest since February. Societe Generale estimated that should the current tariffs remain in place, the US economy will be harmed to the tune of 0.25 per cent over a two-to-three year horizon, compared with 0.5 per cent in China. The impact globally will be 0.15 per cent, while the imposition of tariffs on all Chinese goods could double the pain, Mr O’Hagan said. Mr Trump piled on the pressure on Saturday, tweeting that “far worse” terms would be on offer for China if it doesn’t act now. While China has invited a US delegation back to Beijing, no dates have been set for the next round of talks, according to White House economic director Larry Kudlow.