Int'l Securities Exchange Chairman to step down (ISE) 41.15 -0.32 : Co announced that after four years, Ivers W. Riley will be stepping down as Chairman of the ISE, but will remain on the Board of Directors. Dr. Frank J. Jones, Ph.D., who has been a director of the ISE since 2000 and is currently Vice Chairman of the Board, will become Chairman. Dr. John F. Marshall, Ph.D., who has been a director of the ISE since 2000 and is currently Chairman of the Finance and Audit Committee, will now become Vice Chairman.