America now boasts the strongest manufacturing sector in the world. Earlier today, we learned the U.S. purchasing manager's index (PMI) for manufacturing hit 57.9, the highest level since April 2010. Any reading above 50 signals growth, while anything below signals contraction. Export sales climbed at the fastest rate in three years, and manufacturing payrolls increased at the steepest pace since March 2013 "The U.S.