WITH the euro crisis in abeyance, high oil prices have become the latest source of worry for the world economy. “Oil is the new Greece” is a typical headline on a recent report by HSBC analysts. The fear is understandable. Oil markets are edgy; tensions with Iran are high. The price of Brent crude shot up by more than $5 a barrel on March 1st, to $128, after an Iranian press report that explosions had destroyed a vital Saudi Arabian oil pipeline. It fell back after the Saudis denied the claim, but at $125, crude is still 16% costlier than at the start of the year.