The Bear Stearns Companies, Inc. was an American investment bank, securities trading, and brokerage firm that failed in 2008 as part of the global financial crisis and recession. After its closure it was subsequently sold to JPMorgan Chase. The company's main business areas before its failure were capital markets, investment banking, wealth management, and global clearing services, and it was heavily involved in the subprime mortgage crisis.

Investment banking pertains to certain activities of a financial services company or a corporate division that engages in providing advisory-based services on financial transactions for clients, such as institutional investors, corporations, and governments. Traditionally associated with corporate finance, such a bank might assist in raising financial capital by underwriting or acting as the client's agent in the issuance of debt or equity securities. An investment bank may also assist companies involved in mergers and acquisitions (M&A) and provide ancillary services such as market making, trading of derivatives and equity securities, FICC services or research. Most investment banks maintain prime brokerage and asset management departments in conjunction with their investment research businesses. As an industry, it is broken up into the Bulge Bracket, Middle Market, and boutique market.