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
how does a brokerage firm work?
user
the brokerage executes the transactions you tell them to make on your behalf. other than acting as your agent for those, and maintaining your account, and charging a fee for the service, they have no involvement -- they do not attempt to predict optimal anything, or hold any assets themselves.
assistant