Is The Euro Doomed To Short- To Medium-Term Weakness?
1) Fiscal tightening will occur through the euro zone, especially in Greece and the other countries with large deficits.
2) Fiscal tightening either means that the private sector financial savings balance must weaken or that the current account balance will become stronger.
3) If the private sector financial balance weakens, then there will be a depression which will weaken the euro.
4) A stronger current account balance requires a weaker euro.
Since we given premises 1) and 2) must see either a weaker private sector financial savings balance or a stronger current account balance, then if we accept the truths of premises 3) and 4), a weaker euro is a certainty.
Is he right? Well, assuming very briefly for the sake of the argument that the premises are all correct, then he would indeed be right to argue that a weaker euro is unavoidable.
But are the premises correct? Well, premise 1) is nearly a certainty. Clearly most euro area countries, but particularly those that now have large deficits, will reduce their budget deficits.
Premise 2) is an accounting identity and thus a definite certainty. Private sector financial savings is defined as the government budget deficit plus the current account balance, so a lower government deficit will require either a reduction in the private sector financial savings balance or an increase in the current account surplus.
Premises 3) and 4) are however clearly incorrect. A weaker private sector financial savings deficit is not by necessity coupled with a depression. Indeed, empirically the private sector financial savings deficit is in fact bigger during booms than during busts. By reducing the budget deficit, consumers will feel less need to save in preparation for future fiscal tightening, and businesses can invest more because of lower interest rates. While a lower interest rate will in itself weaken the currency, this is something which probably has already been priced in during the recent period of euro depreciation.
And the idea that a stronger current account balance requires devaluation is pure nonsense. Latvia has seen its current account balance swing from a deficit of 26% of GDP in 2007 to a surplus of about 10% of GDP in 2009, without devaluation. Because fiscal tightening reduces demand for imports it is an effective way of reducing a current account deficit without lowering the value of the currency.
And despite a dramatic dollar rally in late 2008 and early 2009, the U.S. current account deficit dropped significantly in late 2008 and the first half of 2009. Later in 2009 the dollar did again start to drop, after which the U.S. current account deficit again increased....
As I explained here (commenting on the fact that the U.K. deficit hasn't fallen despite the weak pound, which also contradicts Münchau’s' premise), movements in real interest rates appears to be more influential than movements in real exchange rates on external balances.
As a side note I have no strong opinion on the euro's near term movements. There are both good arguments for and against it becoming weaker. A key valid argument for it is that the ECB is likely to abstain from interest rate hikes for as long as the panic about government debt in Greece and elsewhere in the euro zone persists. But this is something which given the last few months' depreciation might have already been priced in. Also, because fiscal tightening will reduce inflation, real interest rates might be going up even if nominal interest rates remain unchanged.