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Thomas Peterffy, founder and CEO of Interactive Brokers, has been voicing his opinion about the impact of high-frequency trading on the markets. Peterffy strongly believes that better monitoring and new regulations must be put in place because this form of trading has gone too far. Petterfy is photographed with his favorite riding horse, “Ophelia”, at his Greenwich, Conn estate on Tuesday, October 18, 2011.Jesse Neider for the Wall Street Journal

Thomas Peterffy, founder and CEO of Interactive Brokers, has been voicing his opinion about the impact of high-frequency trading on the markets. Peterffy strongly believes that better monitoring and new regulations must be put in place because this form of trading has gone too far. Petterfy is photographed with his favorite riding horse, “Ophelia”, at his Greenwich, Conn estate on Tuesday, October 18, 2011. 

Jesse Neider for the Wall Street Journal