 Alliancebernstein L.P. decreased its stake in shares of Argo Group NASDAQ:ARGO by 28.5 during the fourth quarter, according to its most recent 13F filing with the Securities and Exchange Commission. The institutional investor owned 45,767 shares of the companys stock after selling 18,210 shares during the quarter. Alliancebernstein L.P. owned about 0.13 of Argo Group ... 