By Omar Al-Ubaydli – To see why the current trade deficit is benign, we need to understand the relationship between trade and the dollar’s value. Greenbacks are like any commodity in that the more people want to possess them, the higher their price. People acquire dollars primarily for two reasons: buying American goods and investing within the United States.
If the United States is importing more than it exports, then American consumers are exchanging dollars for foreign currencies to buy foreign goods more than foreigners are doing the reverse, meaning that foreigners are accumulating lots of dollars that they’re not using to buy American goods.
So why has America been recording a large, persistent trade deficit, and why isn’t the dollar devaluing? It’s due to the second major difference (from 1970s): The investment-based demand for foreign currencies—which we momentarily set aside—has ballooned. People no longer exchange currencies just to buy foreign goods.
Consequently, the dollar no longer corrects trade imbalances. more> https://goo.gl/L1VHHr