OMAHA, Neb.--(BUSINESS WIRE)--For the first time, retail investors can conduct social research on publicly traded equities and their associated brands through Twitter in their brokerage accounts at TD Ameritrade, Inc. (“TD Ameritrade”), a broker-dealer subsidiary of the TD Ameritrade Holding Corporation (NYSE: AMTD). The new research capabilities are the result of a collaboration with social media firm SwanPowers LLC, making TD Ameritrade the first major online brokerage firm to give this level