 Ladenburg Thalmann Financial Services Inc. trimmed its position in BlackRock Inv. Quality Munic. Trust Inc. NYSE:BKN by 17.1 in the fourth quarter, according to its most recent 13F filing with the Securities and Exchange Commission. The fund owned 22,319 shares of the companys stock after selling 4,615 shares during the quarter. Ladenburg Thalmann Financial Services ... 