This document discusses how blockchain technology could impact financial markets according to a survey of 200 financial institutions. It finds that 14% expect to have blockchains in commercial production by 2017, which it calls "Trailblazers". Trailblazers expect blockchains to reduce "invisible threats" from new competitors and business models. They see the greatest benefits in clearing and settlements, wholesale payments, equity/debt issuance, and reference data. While most institutions don't expect major disruption, Trailblazers see opportunities for new business models in clearing/settlements, payments, and equity/debt markets. Regulations may be delaying disruption in some areas.