as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
no transaction fee etf trades - what's the catch?
user
afaik, it's also possible that the etf company is paying ameritrade for every trade you make. even if your brokerage doesn't make you pay a fee to trade etfs, the company that created and runs the etf is still making money when you purchase and use their etfs. see "what motivates each player?" at yahoo finance.
assistant