Banking sector has transformed into a promising service sector to boost the economy and to stabilize the financial services post globalisation. Investment banking is one of the crucial areas which creates formation of capital, generates income, assists in corporate actions like tender offer, merger and acquisitions, spin off, split off, provides advisory services to various financial institutions, trading, hedging etc.which can influence in uplifting the economy with respect to GDP, foreign reserves, foreign direct investment, employment creation and robust financial markets. Merchant banking is the conventional term used for the investment banking in most of the Asean countries which were associated as part of their banking operations unlike western countries where Investment Banking is a separate banking wing apart from commercial and retail banking functions. This book is an attempt in comprehending the personal experience spent in a leading investment banking firm trying to enhance the practical application of the knowledge and offer insight about the operative functions of an investment banking firm.