An '''Investment bank''' is a financial institution that provides the underwriting of debt & equity securities, facilitates M&A activity between companies, and does brokerage services to both individual and institutional clients. Prominent investment banks include Goldman Sachs, Morgan Stanley and Citigroup. | An '''Investment bank''' is a financial institution that provides the underwriting of debt & equity securities, facilitates M&A activity between companies, and does brokerage services to both individual and institutional clients. Prominent investment banks include Goldman Sachs, Morgan Stanley and Citigroup. |