This paper explores how non-U.S. central banks behave when firms in their economies engage in currency mismatch, borrowing more heavily in dollars than justified by their operating exposures. We begin by documenting that, in a panel of 53 countries, central bank holdings of dollar reserves are...

The influence of monetary policy over interest rates, and via interest rates over nonfinancial economic activity, stems from the central bank's role as a monopolist over the supply of bank reserves. Several trends already visible in the financial markets of many countries today threaten to...