An investment bank is a financial institution that acts as an intermediary between companies and investors. Unlike commercial banks that primarily focus on accepting deposits and making loans to individuals and businesses, investment banks specialize in raising capital for corporations and governments, providing financial advisory services, and trading securities.
Key Functions of an Investment Bank:
- Underwriting: This is perhaps the most well-known function. Investment banks help companies issue and sell securities, such as stocks (IPOs and follow-on offerings) and bonds, to the public. They assess the market demand, price the securities, and distribute them to investors. This process is known as underwriting. Underwriters assume the risk that the securities may not sell at the agreed-upon price.
 - Mergers and Acquisitions (M&A) Advisory: Investment banks advise companies on mergers, acquisitions, divestitures, and other corporate restructurings. This involves valuing companies, structuring deals, negotiating terms, and providing strategic advice. They act as intermediaries, connecting buyers and sellers and helping them navigate complex transactions.
 - Sales and Trading: Investment banks facilitate the buying and selling of securities for their clients and for their own accounts (proprietary trading). Sales teams connect with institutional investors, such as pension funds and hedge funds, to execute trades. Trading desks manage the firm’s inventory of securities and attempt to profit from market movements.
 - Research: Investment banks employ research analysts who study companies, industries, and economies and provide investment recommendations to clients. These research reports help investors make informed decisions about where to allocate their capital.
 - Asset Management: Some investment banks also offer asset management services, managing investment portfolios for individuals, institutions, and governments. This may involve managing mutual funds, hedge funds, or private equity funds.
 - Private Equity: Investment banks may have private equity arms that invest directly in companies, often taking them private. These private equity firms aim to improve the operations and profitability of the companies they invest in and then sell them for a profit.
 
Clients of Investment Banks:
Investment banks serve a diverse range of clients, including:
- Corporations: Companies seeking to raise capital, restructure their operations, or make acquisitions.
 - Governments: National, regional, and local governments seeking to issue bonds to finance public projects.
 - Institutional Investors: Pension funds, hedge funds, mutual funds, and other large investors.
 - High-Net-Worth Individuals: Wealthy individuals seeking investment advice and asset management services.
 
Importance of Investment Banks:
Investment banks play a crucial role in the financial system by facilitating the flow of capital from investors to companies and governments. They enable companies to grow, create jobs, and innovate. They also provide investors with opportunities to earn returns on their investments. Furthermore, their expertise in M&A can help companies become more efficient and competitive.
In summary, investment banks are complex financial institutions that provide a wide range of services to corporations, governments, and investors, playing a vital role in the global economy.