This document provides an overview of investment banking. It defines investment banking as assisting companies and governments in raising capital through issuing securities. It also discusses mergers and acquisitions advisory services. The document outlines the key functions of investment banking such as arranging financing deals, advising on M&A transactions, and asset management. It also compares commercial and investment banking. Finally, it discusses the major players in the Indian investment banking sector and highlights areas for improvement such as developing more robust risk management systems and using better technology.