The OECD now forecasts the eurozone economy to be in a six-month recession lasting through the first quarter of 2012, followed by a slow recovery that will leave the 17-nation bloc with only 0.2 percent growth next year. Despite the OECD’s warning, European markets enjoyed one of their best sessions in weeks amid hopes that radical plans were being readied for the Dec. 9 meeting of EU leaders in Brussels. The Stoxx 50 of leading European shares ended 3.6 percent higher at 2,208.89.