Interactive Brokers is a broker with an international presence with whom you can open an account from almost any country. It also allows us to trade stocks and indices from a large number of countries, being the largest broker in the United States. Interactive Brokers is headquartered in Greenwich, Connecticut and has more than 1,200 employees in its offices in the United States, Switzerland, Canada, Hong Kong, United Kingdom, Australia, Hungary, Russia, India, China and Estonia. Interactive Brokers is regulated by the SEC, FINRA, NYSE and SFA and other regulatory agencies worldwide.