What is a maintenance margin requirement? Assume that you bought 100 shares of Acme, Inc., at $100

Question:

What is a maintenance margin requirement? Assume that you bought 100 shares of Acme, Inc., at $100 a share. If the maintenance margin requirement is 0.30, at what price would your give you a margin call? What does a margin call mean?
Broker
A broker is someone or something that acts as an intermediary third party, managing transactions between two other entities. A broker is a person or company authorized to buy and sell stocks or other investments. They are the ones responsible for...