 Advisor Group Holdings Inc. trimmed its stake in Duff and Phelps Global Utlity Inm Fd Inc NYSE:DPG by 44.8 in the second quarter, Holdings Channel.com reports. The firm owned 198,638 shares of the investment management companys stock after selling 161,427 shares during the quarter. Advisor Group Holdings Inc.s holdings in Duff and Phelps Global Utlity ... 