Germany has triggered a near-panic flight from southern European debt markets by warning that there will be no EU bail-outs, even though it fears the region's economic crisis has turned dangerous and could prove "fatal" for the entire eurozone. The yield on 10-year Greek bonds blasted upwards by over 40 basis points to 7.15pc in a day of wild trading. Spreads over German Bunds reached almost four percentage points, by far the highest since Greece joined the euro, and close to levels that risk a self-feeding spiral. Contagion hit Portuguese, Spanish, Irish, and Italian bonds. George Papandreou, the Greek premier,...