OMAHA, Neb.--(BUSINESS WIRE)--TD Ameritrade Holding Corporation (NYSE:AMTD) has released operating results for the third quarter of fiscal 2015. The Company’s results for the quarter ended June 30, 2015 include the following:(1) Net income of $197 million, or $0.36 per diluted share Net new client assets of approximately $11.7 billion, an annualized growth rate of 7 percent Average client trades per day of approximately 434,000, an activity rate of 6.7 percent Net revenues of $794 million, 57 p