A floor broker is an independent member of an exchange who can act as a broker for other members who become overloaded with orders, as an agent on the floor of the exchange. The floor broker receives an order via Teletype machine from his firm's trading department and then proceeds to the appropriate trading post on the exchange floor. There he joins other brokers and the specialist in the security being bought or sold and executes the trade at the best competitive price available. On completion of the transaction the customer is notified through his registered representative back at the firm and the trade is printed on the consolidated ticker tape which is displayed electronically around the country. A floor broker should not be confused with a floor trader who trades as a principal for his or her own account, rather than as a broker. Commission brokers are employees of a member firm.

Mary Lou (born March 15, 1992) is an American actress. She is known for playing Mary Ferry on the Nickelodeon television series Unfabulous.

At age 8, she chose to pursue a career in television and film.

Mary Lou’s show business career started at age six when she entertained as a member of Singing Solo (a children's singing group located in La Mesa, CA) at a local street fair with a rendition of The Good Ship Lollipop. After this performance, she chose acting as her career. Over the next few years, Lou went on to sing at over two dozen venues throughout Southern California, Texas and Tennessee, winning multiple local, state, regional, national and world championship titles.

Mary Lou also filmed a guest-starring role on Phil of the Future, as a math-nerd named Alex, in Good Phil Hunting. Mary also appeared on Future Girls: Adventures in Marine Biology and Bad Mother's Handbook and guest starred on What should you do?. More recently Mary was on Glee. She continues to audition daily for feature films, television and voiceover.