Final answer:
Mortgage brokers do not regulate or supervise the sale of securities. That is the task of financial regulatory bodies like the SEC.
Step-by-step explanation:
Mortgage brokers are involved in a variety of activities, which typically include assessing the credit history of borrowers, gathering necessary financial information, finding suitable lenders, and facilitating communications between borrowers and lenders.
However, mortgage brokers do not regulate and supervise the sale of securities or the brokers, dealers, and bankers who sell them. This activity is usually conducted by financial regulatory bodies such as the Securities and Exchange Commission (SEC) in the United States or similar organizations in other countries.