This document discusses how blockchain technology can transform the financial services industry. It begins by describing how blockchain works as a distributed digital ledger that allows untrusted parties to validate transactions without intermediaries. It then outlines several core applications of blockchain for banks, including transferring value through cryptocurrencies and smart contracts, managing digital identities through Know-Your-Customer processes, and implementing trade finance and commercial insurance solutions. The document also presents some real-world examples of blockchain being used by banks and financial institutions and concludes by considering whether blockchain presents an opportunity or threat to the industry.