The International Monetary Fund, in its latest World Economic Outlook, revised its July estimate for world growth higher, to 3.7%. That's way up from 2016, when the world economy grew by 3.2%.

In July, the IMF estimated global GDP for 2017 would jump to 3.5%, and 3.6% in 2018. The latest revision bumped up the expected growth of the world economy to 3.6% in 2017 and 3.7% in 2018.