Recent studies have emphasized the role of valuation effects due to exchange rate movements in easing the process of adjustment of the external balance of a country. This paper asks to what extent valuation effects are desirable from a global perspective as a mean to achieve an efficient allocation of resources. In a frictionless world, it is desirable to have large movements in prices and exchange rates. But once a small degree of price rigidity is introduced not only should prices be stabilized but also the response of the exchange rate should be muted. There is a minor role for valuation effects that depends both on the size and composition of assets and liabilities.The analysis of the external imbalances of a country has recently become a compelling subject of research for the historically high current account deficits recorded in the US economy together with the increasing worsening of its net foreign asset position. 1 The current paradigm to think about the external balance of a country is the so-called "intertemporal approach to the current account". According to this theory, the external adjustment of a country occurs through movements in the trade balance, as a consequence of changes in the allocation of real quantities and equilibrium relative prices. 2 This approach misses an important channel of adjustment, a financial one, since it assumes that the portfolio return is not varying over time and neglects the heterogenous composition of the financial instruments that are part of the portfolio of a country. Even if there are no changes in the borrowing decisions of a country, the net foreign asset position can change because the market value of the stock of assets and liabilities varies. Movements in the nominal exchange rate are an important source of these valuation effects.This paper analyzes the extent to which the valuation channel due to the exchange rate is desirable from a global welfare perspective. The main finding is that whereas in a frictionless world valuation effects are of important magnitude once a small degree of price rigidity is introduced they are less desirable and play a minor role. The prescription for adopting inflation-targeting regimes that results from current monetary models is strong enough to dominate other objectives like the world distribution of wealth through valuation effects.The issue of desirability has been neglected by the current literature. Studies as Gourinchas and Rey (2005, in press), Lane and Milesi-Ferretti (2004, in press-a,b) and Tille (2003Tille ( , 2005, have documented that in the recent experience of the US economy valuation effects have accounted for a large fraction of the changes in the international investment position of the country and have concluded that a depreciation of the US dollar can ease the real adjustment needed to reduce the external imbalances. 3 As pointed out by Obstfeld (2004), a theory in which financial adjustments and in particular exchange rate movements are important in determining the frontier of the feasible allocation ...