European stocks turned green, after the ECB's meeting, with Mario Draghi's bond-buying proposal involving unlimited purchases of government debt. The Stoxx Europe 600 Index added 0.3 per cent to 266.32; French CAC 40 Index jumped 0.7 per cent to 3,421.94, while German DAX 30 Index gained 0.6 per cent to 6,975.06.