An Investment Bank is a financial institution that assists clients in raising capital by underwriting and issuing securities. Investment banks also provide advice on mergers, acquisitions, and other corporate finance transactions.The modern investment banking industry has its roots in the early 19th century, when commercial banks began offering services to help companies raise capital. Investment banks typically work with large corporations and help them navigate the complex financial landscape.Today, investment banks are a vital part of the global economy, helping companies raise capital to fuel growth and expansion. They play a critical role in facilitating economic activity and creating jobs.