Speech by Bernanke-2005:
The U.S. Current Account Deficit: Two Perspectives
We will find it helpful to consider, as background for the analysis of the U.S. current account deficit, two alternative ways of thinking about the phenomenon--one that relates the deficit to the patterns of U.S. trade and a second that focuses on saving, investment, and international financial flows. Although these two ways of viewing the current account derive from accounting identities and thus are ultimately two sides of the same coin, each provides a useful lens for examining the issue.
The first perspective on the current account focuses on patterns of international trade. You are probably aware that the United States has been experiencing a substantial trade imbalance in recent years, with U.S. imports of goods and services from abroad outstripping U.S. exports to other countries by a wide margin. According to preliminary data, in 2004 the United States imported $1.76 trillion worth of goods and services while exporting goods and services valued at only $1.15 trillion. Reflecting this imbalance in trade, current payments from U.S. residents to foreigners (consisting primarily of our spending on imports, but also including certain other types of payments, such as remittances, interest, and dividends) greatly exceed the analogous payments that U.S. residents receive from abroad. By definition, this excess of U.S. payments to foreigners over payments received in a given period equals the U.S. current account deficit, which, as I have already noted, was $666 billion in 2004--close to the $617 billion by which the value of U.S. imports exceeded that of exports.
When U.S. receipts from its sales of exports and other current payments are insufficient to cover the cost of U.S. imports and other payments to foreigners, U.S. households, firms, and governments on net must borrow the difference on international capital markets.3 Thus, essentially by definition, in each period U.S. net foreign borrowing equals the U.S. current account deficit, which in turn is closely linked to the imbalance in U.S. international trade.
That the nation's imports currently far exceed its exports is both widely understood and of concern to many Americans, particularly those whose livelihoods depend on the viability of exporting and import-competing industries. The extensive attention paid to the trade imbalance in the media and elsewhere has tempted some observers to ascribe the growing current account deficit to factors such as changes in the quality or composition of U.S. and foreign-made products, changes in trade policy, or unfair foreign competition. However, I believe--and I suspect that most economists would agree--that specific trade-related factors cannot explain either the magnitude of the U.S. current account imbalance or its recent sharp rise. Rather, the U.S. trade balance is the tail of the dog; for the most part, it has been passively determined by foreign and domestic incomes, asset prices, interest rates, and exchange rates, which are themselves in turn the products of more fundamental driving forces. Instead, an alternative perspective on the current account appears likely to be more useful for explaining recent developments. This second perspective focuses on international financial flows and the basic fact that a country's saving and investment need not be equal in each period.
In the United States, as in all countries, economic growth requires investment in new capital goods and the upgrading and replacement of older capital. Examples of capital investment include the construction of factories and office buildings and firms' acquisition of new equipment, ranging from drill presses to computers to airplanes. Residential construction--the building of new homes and apartment buildings--is also counted as part of capital investment.4
All investment in new capital goods must be financed in some manner. In a closed economy without trade or international capital flows, the funding for investment would be provided entirely by the country's national saving. By definition, national saving is the sum of saving done by households (for example, through contributions to employer-sponsored 401(k) accounts) and saving done by businesses (in the form of retained earnings) less any budget deficit run by the government (which is a use rather than a source of saving).5
As I say, in a closed economy investment would equal national saving in each period; but, in fact, virtually all economies today are open economies, and well-developed international capital markets allow savers to lend to those who wish to make capital investments in any country, not just their own. Because saving can cross international borders, a country's domestic investment in new capital and its domestic saving need not be equal in each period. If a country's saving exceeds its investment during a particular year, the difference represents excess saving that can be lent on international capital markets. By the same token, if a country's saving is less than the amount required to finance domestic investment, the country can close the gap by borrowing from abroad. In the United States, national saving is currently quite low and falls considerably short of U.S. capital investment. Of necessity, this shortfall is made up by net foreign borrowing--essentially, by making use of foreigners' saving to finance part of domestic investment. We saw earlier that the current account deficit equals the net amount that the United States borrows abroad in each period, and I have just shown that U.S. net foreign borrowing equals the excess of U.S. capital investment over U.S. national saving. It follows that the country's current account deficit equals the excess of its investment over its saving.
To summarize, I have described two equivalent ways of interpreting the current account deficit, one in terms of trade flows and related payments and one in terms of investment and national saving. In general, the perspective one takes depends on the particular analysis at hand. |
