A specific division of banking related to the creation of capital for other companies. Investment banks underwrite new debt and equity securities for all types of corporations. Investment banks also provide guidance to issuers regarding the issue and placement of stock.
Taobiz explains Investment Banking
In addition to the services listed above, investment banks also aid in the sale of securities in some instances. They also help to facilitate mergers and acquisitions, reorganizations and broker trades for both institutions and private investors. They can also trade securities for their own accounts.