” We use the term “reserve currency” when referring to the common use of the dollar by other countries when settling their international trade accounts. For example, if Canada buys goods from China, it may pay China in US dollars rather than Canadian dollars, and vice versa. However, the foundation from which the term originated no longer exists, and today the dollar is called a “reserve currency” simply because foreign countries hold it in great quantity to facilitate trade.
The first reserve currency was the British pound sterling. Because the pound was “good as gold,” many countries found it more convenient to hold pounds rather than gold itself during the age of the gold standard. The world’s great trading nations settled their trade in gold, but they might hold pounds rather than gold, with the confidence that the Bank of England would hand over the gold at a fixed exchange rate upon presentment. Toward the end of World War II the US dollar was given this status by international treaty following the Bretton Woods Agreement. The International Monetary Fund (IMF) was formed with the express purpose of monitoring the Federal Reserve’s commitment to Bretton Woods by ensuring that the Fed did not inflate the dollar and stood ready to exchange dollars for gold at $35 per ounce. Thusly, countries had confidence that their dollars held for trading purposes were as “good as gold,” as had been the Pound Sterling at one time.
However, the Fed did not maintain its commitment to the Bretton Woods Agreement and the IMF did not attempt to force it to hold enough gold to honor all its outstanding currency in gold at $35 per ounce. The Fed was called to account in the late 1960s, first by France and then by others, until its gold reserves were so low that it had no choice but to revalue the dollar at some higher exchange rate or abrogate its responsibilities to honor dollars for gold entirely. To it everlasting shame, the US chose the latter and “went off the gold standard” in September 1971.”