Citigroup Global Markets represents the corporate banking and capital markets arm of Citigroup's broader Corporate and Investment Banking group (CIB). The investment bank provides advisory services regarding mergers and acquisitions, divestitures, and financing. It is also involved in the underwriting and trading of debt, equities, and derivatives. The unit has a presence in approximately 100 countries. Another segment of the CIB, Transaction Services, offers cash management, securities lending, custody, and clearing services. Schroder Salomon Smith Barney is an investment banking and securities brokerage firm providing investment banking services to supranationals, governments, financial institutions and large- and mid-capitalization corporate clients.