1.  Bond Dealers of America: Letter from Michael Nicholas, Chief Executive Officer, dated March 12, 2013

2.  Charles Schwab & Co., Inc.: Letter from Michael P. Moran, Vice President, Compliance, dated March 12, 2013

3.  Lumesis, Inc.: Letter from Gregg L. Bienstock, Co-Founder and Chief Executive Officer, dated March 11, 2013

4.  Lumesis, Inc.: Letter from Gregg L. Bienstock, Co-Founder and Chief Executive Officer, dated July 17, 2013

5.  R.W. Smith & Associates, Inc.: E-mail from Paige Pierce dated March 20, 2013

6.  Securities Industry and Financial Markets Association: Letter from David L. Cohen, Managing Director and Associate General Counsel, dated March 12, 2013

7.  TMC Bonds, L.L.C.: Letter from Thomas S. Vales, Chief Executive Officer, dated March 11, 2013

8.  Wells Fargo Advisors, LLC: Letter from Robert J. McCarthy, Director of Regulatory Policy, dated March 12, 2013