IMF slices global growth forecast for 2015CNBC In its World Economic Outlook (WEO) Update published on Tuesday, the IMF projected the world economy would expand by 3.5 percent this year and 3.7 percent next year, picking up from 3.3 percent in 2014 but lower than its previous estimates. In October, it predicted global growth for this year and next at 3.8 and 4 percent, respectively.