Euro is poor guide to fate of single-currency project

THE Greek crisis is compromising currency traders' reputation for being the first and fastest to react to big economic or political news. The prices of southern eurozone government bonds and of European equities have fallen since European politicians began to talk openly about the possibility that Greece might default or even leave the euro. Yet, at US$1.1370, the euro is trading closer to the top than the bottom of its three-month range against the dollar.

What is going on? FX traders can defend themselves by saying that currency options point to underlying pessimism about the single currency's prospects. But that fails to explain why the gloom is not showing up in the spot market.

One problem is that exchange rates are always two-sided. So, the euro/dollar also reflects what Federal Reserve chair Janet Yellen is going to do, and when. Bond yield spreads and stock prices can be a purer expression of investors' concern about the threat to a monetary union which was supposed to be irreversible. Also, hedging flows are sometimes making the euro move in counter-intuitive ways. Many foreign investors who bought eurozone stocks and bonds earlier this year hedged their exposure to the single currency, which they anticipated would fall.