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Citigroup Inc. is a diversified global financial‑services holding company that provides a broad range of products including consumer and corporate banking, credit cards, treasury and trade solutions, securities custody, investment‑banking advisory, and wealth‑management services. It operates within the financial services sector, classified as a “Banks – Diversified” institution, and serves individuals, small businesses, corporations, governments, and institutional clients worldwide. The firm’s extensive network spans nearly 180 countries, giving it a significant cross‑border presence and making it one of the world’s largest banks by assets. Its market position is notable for strong credit‑card issuance, a large corporate banking franchise, and a comprehensive suite of capital‑markets and securities services.