Book excerpt: The application of technology to derivatives trading has resulted in the development and use of electronic systems that are changing the way derivatives are traded. What is the appropriate regulation of electronic trading systems for exchange-traded futures (ETF) and OTC derivatives? This report answers these questions: how is technology being used in the ETF market, and what concerns does this use raise under the CEA?; how is technology being used in the OTC derivatives market, and what concerns does this use raise under the CEA?; and what alternatives have been suggested for addressing the concerns by the use of technology in the derivatives markets?