After three serious attempts since November, the euro finally broke through Dollars 1.50 yesterday. That also marks a record high against sterling although the euro is still 5 per cent shy of last year’s peaks against the Japanese yen and Swiss franc. Eurozone exports to the rest of the world amount to about 20 per cent of the region’s gross domestic product - twice the level of the US - so there is good reason to worry about the effect of a rising euro on economic growth.