In its latest World Economic Outlook (WEO) update released today in Davos, Switzerland on the sidelines of the World Economic Forum, the IMF said global output is estimated to have grown by 3.7 per cent in 2017, which is 0.1 percentage point faster than projected in the fall and half percentage point higher than in 2016.
The pickup in growth has been broad based, with notable upside surprises in Europe and Asia.
Global growth forecast for 2018 and 2019 have been revised upward by 0.2 percentage point to 3.9 per cent. The revision reflects increased global growth momentum and the expected impact of the recently approved US tax policy changes, the IMF said.
However, Maurice Obstfeld, IMF Economic Counsellor and Director of Research briefing media on the key findings of the WEO update, had a word of caution.
"As the year 2018 begins, the world economy is gathering speed. This is good news. But political leaders and policymakers must stay mindful that the present economic momentum reflects a confluence of factors that is unlikely to last for long," he said.
"The global financial crisis may seem firmly behind us, but without prompt action to address structural growth impediments, enhance the inclusiveness of growth, and build policy buffers and resilience, the next downturn will come sooner and be harder to fight," Mr Obstfeld said.
According to Mr Obstfeld, the primary sources of GDP acceleration so far have been in Europe and Asia, with improved performance also in the US, Canada and some large emerging markets, notably Brazil and Russia, both of which shrank in 2016, and Turkey.
Much of this momentum will carry through into the near term, Mr Obstfeld said. The recent US tax legislation will contribute noticeably to US growth over the next few years, largely because of the temporary exceptional investment incentives that it offers, he said.
This short-term growth boost will have positive, albeit short-lived, output spillovers for US trade partners, but will also likely widen the US current account deficit, strengthen the dollar, and affect international investment flows, the IMF official said.
"Even as economies return to full employment, inflation pressures remain contained and nominal wage growth is subdued.
Financial conditions are quite easy, with booming equity markets, low long-term government borrowing costs, compressed corporate spreads, and attractive borrowing terms for emerging market and developing economies," he said.
In its WEO update, the IMF said the cyclical upswing underway since mid-2016 has continued to strengthen. Some 120 economies, accounting for three quarters of world GDP, have seen a pickup in growth in year-on-year terms in 2017, the broadest synchronised global growth upsurge since 2010, it said.
Among advanced economies, growth in the third quarter of 2017 was higher than projected in the fall, notably in Germany, Japan, Korea and the US.
Key emerging market and developing economies, including Brazil, China and South Africa, also posted third-quarter growth stronger than the fall forecasts.
High-frequency hard data and sentiment indicators point to a continuation of strong momentum in the fourth quarter.
"World trade has grown strongly in recent months, supported by a pickup in investment, particularly among advanced economies, and increased manufacturing output in Asia in the run up to the launch of new smartphone models.
Purchasing managers' indices indicate firm manufacturing activity ahead, consistent with strong consumer confidence pointing to healthy final demand," the IMF said.