Harris Bock has over 20 years of experience in the US equity and index options marketplace. He started his trading career in 1999, making markets on the Pacific Stock Exchange and the Philadelphia Stock Exchange. In late 2002, Harris left the floor to start Group One’s electronic trading operation on the International Securities Exchange, and helped to usher in a new era of electronic market making for the firm. After a successful decade of trading, Harris started Dynamex in 2009 to service instituional clients with his options knowledge gained during a decade of making markets in options, and then in 2017 Harris lent his expertise to Delta One and became a co-founder of the platform. Series 4, 7, 24, 63.