 Ladenburg Thalmann Financial Services Inc. reduced its stake in shares of iShares SP GSCI Commodity Indexed Trust NYSEARCA:GSG by 7.7 in the fourth quarter, according to its most recent filing with the SEC. The fund owned 21,435 shares of the companys stock after selling 1,798 shares during the period. Ladenburg Thalmann Financial Services Inc.s holdings ... 