The dollar kept its honored position until the 1950s, when such factors as the Korean and Vietnam Wars, and the rehabilitation of the European and Japanese economies, caused an outflow of U.S. dollars.
美元優勢一直維持到廿世紀中期，後因受到韓戰、越戰的拖累，加上西歐工業先進國家和日本經濟復甦及出口成長，以及國際金融危機頻仍，使美國黃金外流，存量減少。