The assessment took into account all current and proposed tariffs on Chinese goods that enter the U.S., as well as knock-on effects the trade tensions have on investor confidence and financial markets. But much of that impact is expected to be offset by the Chinese government's policies to stimulate the economy, noted Changyong Rhee, director of the IMF's Asia and Pacific Department.
The analysis was published on Friday in the IMF's Regional Economic Outlook report focusing on the Asia Pacific region.
Rhee told reporters that direct economic impact from the tariff fight between the U.S. and China is actually "quite small." What's more detrimental is the hit to investor confidence, which has rattled financial markets and is likely to last for a while, he said.
"This is one of the reasons why we feel that headwinds may last longer," Rhee said. "I don't know what will be the end ... I think the lessons we have taken is how much the global financial markets and real economy are well integrated, no one can be free from such shocks."
The U.S. has implemented additional tariffs on around $250 billion worth of Chinese goods that enters its borders, and China has retaliated with extra levies on roughly $110 billion of imports from the U.S.
President Donald Trump's administration has said that it would target another $267 billion of Chinese products, which is nearly all of its remaining imports from the Asian giant.
The tit-for-tat tariffs between the world's two largest economies has hit investor confidence. This week, renewed worries about the global economy — weighed down by trade tensions — led to a sell-off in global markets. Chinese stocks have been among the worst hit, having declined more than 20 percent this year.
The IMF earlier this week downgraded growth forecasts for the global economy for 2018 and 2019, and China hasn't been spared.
The world's second-largest economy is expected to grow at 6.6 percent this year — maintaining an earlier forecast, but its estimated growth next year has been lowered by 0.2 percentage points to 6.2 percent, according to the report. Without the recent steps taken by Chinese authorities, the Asian giant's growth prospects could be even lower amid the escalating trade tensions with the U.S., the IMF said in the report.
China's central bank has cut the amount of reserves held by Chinese banks four times this year, which have helped to stimulate economic activity. But doing so may delay China's structural reforms, the IMF noted in the report.
"Macro policies in China have been focused on addressing the economy's significant and longstanding financial vulnerabilities, but the shift toward stabilizing growth may mean slower progress on deleveraging and thus heightened medium-term risks for China and the entire region," the report said.