The U.S. trade balance in goods narrowed much more than expected in September. Exports for capital goods, industrial materials and consumer goods (excluding autos) all picked up over the month, while imports waned. The result suggests that investment in the global economy is showing rare signs of life in what has been a lackluster environment. Most developed economies remain weak, while some emerging markets are finally bottoming. The shift is subtle but important, as it could mark a more important shift in the global economy.