After declining since the beginning of 2024, shares of Ambac Financial Group, Inc. AMBC have risen by almost 10% over the past five trading sessions.The sale of Ambac Financial Group's legacy financial guarantee business is expected to close by yearend, positioning the holding company for cash earnings "within a year or two," according to Roth Capital Partners.Analyst Harry Fong upgraded the rating for Ambac Financial Group from Neutral to Buy, while raising the price target from $13 to $15.The Ambac Finan ...