John V. Ayanian advises clients on broker-dealer and securities markets regulation. He counsels US and foreign financial institutions and markets on all aspects of their US securities trading, markets, and clearing activities. These include issues arising under US Securities and Exchange Commission (SEC) and Financial Industry Regulatory Authority (FINRA) rules. He also counsels broker-dealers on regulatory and transactional matters. Additionally, John advises market centers on issues involving market structure issues in the equity and options markets.