This document analyzes the role of investment banks in the economic development of Bangladesh. It begins with an introduction and literature review, followed by the research methodology. It then discusses the key roles of investment banks, such as facilitating capital raising and mergers and acquisitions. Several sections analyze the relationship between investment banks and economic indicators like GDP, GNI, employment, inflation, and stock market development. It also examines how investment banks can contribute to sectors like SMEs and women's empowerment. The document concludes by presenting findings on how investment banks have positively impacted Bangladesh's economic growth and providing recommendations to further strengthen this relationship.