Is there still a brokerage firm involved or do I really bypass the broker completely?
All trades involve a brokerage firm even if a stockbroker is not used to help with the trade. Although customers may enter orders for trades via the Internet, customers do not have direct access to the securities markets and therefore must use a brokerage firm in order to execute their trades. Customers should also remember to do their homework where their investments are concerned.
What is the difference between a cash account and a margin account?