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Excerpts from:
Although the amount can’t be precisely tracked, the Federal Reserve Board of Governors recently estimated that foreigners held $950 billion in U.S. banknotes at the end of the first quarter of 2021, or about 45% of all Federal Reserve notes outstanding, including two-thirds of all $100 bills.
The U.S. dollar has been the most widely used international currency since 1945.1 The dollar is the most traded currency on international financial markets, dollars comprise 60% of official reserves (i.e., foreign exchange reserves), and many traded goods, such as oil, are commonly invoiced in dollars. In addition to these commercial uses of the dollar and dollar-denominated assets, individuals in many parts of the world hold U.S. currency, i.e., paper money, both as a store of value and as a medium of exchange.2 This blog post3 explains the widespread use of U.S. currency and provides some simple, back-of-the-envelope calculations on the size of some of the benefits to Americans.
The rest of the world holds a great deal of U.S. currency, i.e., cash. Although the amount can’t be precisely tracked, the Federal Reserve Board of Governors recently estimated that foreigners held $950 billion in U.S. banknotes at the end of the first quarter of 2021, or about 45% of all Federal Reserve notes outstanding, including two-thirds of all $100 bills. Overall holdings of U.S. currency have grown rapidly, however, and overseas holdings of Federal Reserve notes would now be worth closer to $1.1 trillion if such holdings are still half of all U.S. currency.
Foreigners hold a lot of U.S. currency because they see it as a safer alternative to holding their local currency, which might be subject to high and variable inflation. So residents of countries that have less reliable institutions and more political and economic instability tend to hold more U.S. currency. This is good for them, as they get a reliable store of value and medium of exchange.
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