The International Monetary Fund warned governments not to rock the boat with trade wars and other disruption at a time when the global economy is already sailing through choppy waters. “We see downside risk and that means one has to be very careful,” IMF first deputy managing director David Lipton told Bloomberg Television on Friday. “With trade tensions, not knowing where monetary policy is going to go, not knowing how Chinese growth will turn out, it’s time to make sure policymakers do no harm.” Mr Lipton urged the US and other nations to resolve their trade conflicts – a key downside risk the IMF has repeatedly warned against since President Donald Trump began imposing tariffs last year. “The last thing we want is another downturn,” he said at the fund’s spring meetings in Washington. The threat of political missteps is looming over the global economy amid a backlash against free trade that has fuelled the rise of populist governments around the world. The IMF this week downgraded its outlook for world growth in 2019 to the lowest since the financial crisis a decade ago, as conditions worsened in most major advanced economies. The US and China are locked in tense negotiations aimed at ending their nine-month trade war. Even if they do come to an agreement, a trade deal between the world’s two biggest economies could have unintended consequences if China commits to purchases of US goods that crowds out imports from other countries in Asia, Changyong Rhee, head of the IMF’s Asia-Pacific department said on Friday. There is also a risk of new fronts breaking out in the trade war. The EU is considering hitting €10.2 billion (Dh42.39bn) of US goods with retaliatory tariffs over subsidies to Boeing, a draft list shows. The plan follows a US threat to seek $11bn in damages through duties on European goods including helicopters and cheese to counter state aid to Airbus. Both moves stem from parallel, 14-year disputes at the World Trade Organisation over support for aircraft makers. European Commissioner of economic affairs Pierre Moscovici said it was time for the EU and US to “cool down” and steer clear of a trade war. It’s “absurd” for the US to consider the EU a threat like China, Mr Moscovici said. In Europe, weakness has been particularly pronounced in Germany and Italy, though the baseline is for a gradual recovery, IMF European director Poul Thomsen said in Washington on Friday. Meanwhile, Britain’s departure from the EU continues to drag on. The UK was due to leave the EU on March 29, but has twice had to ask the bloc’s other 27 leaders for an extension. The latest plan, agreed this week at a summit in Brussels, is for the UK to depart the bloc by October 31. Prime Minister Theresa May’s government is holding talks with the opposition Labour Party to see if they can agree on a compromise deal that would be supported by Parliament. “This is not an economic debate,” Chancellor of the Exchequer Philip Hammond said. “Bluntly, if we were only driven by economics, the British people would have decided to stay in the European Union. "The reasons for voting to come out were not economic reasons, they were emotional reasons, political reasons.” The challenge is “to find a way of delivering on that political decision of the British people in a way that protects our economy, protects British jobs and British prosperity", he said. In emerging markets, investors were reminded of the perils of government meddling in economy when Brazil’s President Jair Bolsonaro ordered state-owned Petrobras to refrain from increasing diesel prices on Thursday. The hasty decision revived fears of interventionist policies that plagued Latin America’s largest economy under previous governments. There are signs that the global economy may be turning the corner. The IMF is stopping short of predicting a recession. Growth will recover in the second half of the year, said Bank of Japan Governor Haruhiko Kuroda, noting that China’s stimulus measures were having an effect. “It’s true that there are large downside risks,” Mr Kuroda said. However, “I expect global growth will increase in the second half of the year. An accommodative monetary environment will continue, while the supportive Chinese policy effects should slowly start emerging.”