The recent global financial crisis has renewed concerns about the inherent instability of the current international monetary system in which the world’s demands for asset or liquidity are met predominantly using the currency of one country, the United States dollar. If the supply of the global currency is inadequate to support global trade, the world faces deflationary risks. However, since the country issuing the global currency has the privilege of borrowing abroad in its own currency cheaply, its borrowing and, hence the supply of global currency, may become excessive. This may eventually become unsustainable, and may have significant systemic implications for the rest of the world, as witnessed in the global financial crisis.