PRESTOPUNDIT

The question now confronting us is how large a current account deficit in the United States can be financed before resistance to acquiring new claims against U.S. residents leads to adjustment. Even considering heavy purchases by central banks of U.S. Treasury and agency issues, we see only limited indications that the large U.S. current account deficit is meeting financing resistance. Yet, net claims against residents of the United States cannot continue to increase forever in international portfolios at their recent pace. Net debt service cost, though currently still modest, would eventually become burdensome. At some point, diversification considerations will slow and possibly limit the desire of investors to add dollar claims to their portfolios. Resistance to financing, however, is likely to emerge well before debt servicing becomes an issue, or before the economic return on assets invested in the United States or in dollars more generally starts to erode. Even if returns hold steady, a continued buildup of dollar assets increases concentration risk. Net cross-border claims against U.S. residents now amount to about one-fourth of annual U.S. GDP. A continued financing even of today's current account deficits as a percentage of GDP doubtless will, at some future point, increase shares of dollar claims in investor portfolios to levels that imply an unacceptable amount of concentration risk. This situation suggests that international investors will eventually adjust their accumulation of dollar assets or, alternatively, seek higher dollar returns to offset concentration risk, elevating the cost of financing of the U.S. current account deficit and rendering it increasingly less tenable. If a net importing country finds financing for its net deficit too expensive, that country will, of necessity, import less. It seems persuasive that, given the size of the U.S. current account deficit, a diminished appetite for adding to dollar balances must occur at some point.