 Nuveen Asset Management LLC lowered its stake in Argo Group NASDAQ:ARGO by 0.2 during the fourth quarter, Holdings Channel.com reports. The firm owned 930,806 shares of the companys stock after selling 2,202 shares during the quarter. Nuveen Asset Management LLCs holdings in Argo Group were worth 61,200,000 as of its most recent SEC filing. A ... 