Citigroup is a holding company, which engages in the provision of financial products and services. It operates through the following segments: Global Consumer Banking; Institutional Clients Group; and Corporate and Other. The Global Consumer Banking segment provides traditional banking services to retail customers through retail banking, including commercial banking, and Citi-branded cards and Citi retail services. The Institutional Clients Group segment provides corporate, institutional, public sector and high-net-worth clients around the world with a full range of wholesale banking products and services. This segment includes fixed income and equity sales and trading, foreign exchange, prime brokerage, derivative services, equity and fixed income research, corporate lending, investment banking and advisory services, private banking, cash management, trade finance and securities services. The Corporate and Other segment includes certain unallocated costs of global staff functions, other corporate expenses and unallocated global operations and technology expenses, Corporate Treasury, certain North America and international legacy consumer loan portfolios, other legacy assets and discontinued operations.