Securities dealers include individuals or firms that specialize in security market transactions by (1) assisting firms in issuing new securities through the underwriting and market placement of new security issues, and (2) trading in new or outstanding securities on their own account. Only underwriters and dealers that act as financial intermediaries are classified within this category. Security brokers and other units that arrange trades between security buyers and sellers but do not purchase and hold securities on their own account are classified as financial auxiliaries.