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IMF revises global growth forecast due to tax overhaul

President Trump's tax overhaul will give the world economy a shot in the arm according to the International Monetary Fund, which raised its global growth outlook by two-tenths of a percent to 3.9% for both this year and next. Yahoo Finance's Alexis Christoforous, Myles Udland, Dan Roberts and Dan Howley discuss what this means for the markets.