The biggest threat to the eurozone – Germany's recovery

The eurozone seems to have a new saviour - China. This morning, one central bank official declared that "the euro and the European financial markets… are and will be one of the most important investment areas for China's foreign-exchange reserves." And earlier this week, the country pledged to buy more Spanish government debt. And yet, European debt has suddenly started worrying the markets again. The euro slid sharply against the dollar yesterday. And government bond yields were heading higher too. So what's got investors fretting again all of a sudden?