World shares advanced modestly on Wednesday as policymakers in Europe reassured markets that a deal on releasing emergency aid to Greece was close, while a cease-fire in the Middle East further boosted optimism. Gains were limited going into the U.S. Thanksgiving holiday, however, as the failure of European lenders to come to an agreement on Greece kept investors cautious. Trading was extremely light ahead of the U.S. trading holiday on Thursday. Euro zone finance ministers, the International Monetary Fund and the European Central Bank will gather again on Monday, after nearly 12 hours of talks overnight in Brussels ... (full story)