SECURITY BROKERS, DEALERS, AND FLOTATION COMPANIES (SIC 6211) Establishments primarily engaged in the purchase, sale, and brokerage of securities; and those, generally known as investment bankers, primarily engaged in originating, underwriting, and distributing issues of securities. Establishments primarily engaged in issuing shares of mutual and money market funds, unit investment trusts, and face amount certificates are classified in Industry Group 672. Establishments primarily engaged in providing investment advice on a contract or fee basis to establishments which deal in financial contracts are classified in Industry 6282.