This letter is submitted in response to the request of the Securities and Exchange Commission (the "Commission" or "SEC") for comments on the Concept Release on Equity Market Structure (the "Concept Release,,).l The undersigned firms engage, or have affiliates that engage, in automated trading on a proprietary basis and are interested in the inquiry being conducted by the Commission with respec...

Acknowledgements I would like to thank my advisor, Dr. Susan Gauch, for guidance throughout my undergraduate and graduate years at the University of Kansas. Also, thanks to my thesis committee: Dr. Victor Frost, to whom I also owe my many opportunities at ITTC, and Dr. Perry Alexander, who served on my committee on short notice. I would like to thank my family: Ralph, Charlene, Jeff, and Denise...