Changyong Rhee, director of the fund's Asia and Pacific Department, said Macron's win over far-right candidate Marine Le Pen, an economic nationalist, had made him more optimistic that major trade tensions would ease.
"If you asked me this question (on rising protectionism) three to six months ago, I would probably have answered that I am very seriously concerned on the possibility of trade tensions in the global economy," he told reporters in Singapore.
"I think the result of the French elections really show that it's good news to open trade and globalisation, and it reduces the uncertainties of the eurozone," Rhee said.
"So I think at this moment I am a little bit more optimistic that these trade tensions will resolve without bigger tensions."
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The IMF's latest economic outlook had flagged increasing protectionism in Asia's major trading partners and tightening global financial conditions as key downside risks to regional growth.
It said the Asia-Pacific was expected to remain the world's fastest growing region this year and next, at 5.5 per cent and 5.4 per cent, but growth was "clouded with significant uncertainty".
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