 Nuveen Asset Management LLC reduced its position in TD Ameritrade Holding Corp. NASDAQ:AMTD by 52.8 in the 1st quarter, Holdings Channel.com reports. The fund owned 764,897 shares of the financial services providers stock after selling 856,450 shares during the quarter. Nuveen Asset Management LLCs holdings in TD Ameritrade were worth 26,511,000 as of its most ... 