Investment banking is a special segment of banking operation that helps individuals or organisations raise capital and provide financial consultancy services to them. They provide various types of financial services, such as proprietary trading or trading securities for their own accounts, mergers and acquisitions advisory which involves helping organisations in M&As,; leveraged finance that involves lending money to firms to purchase assets and settle acquisitions, restructuring that involves improving structures of companies to make a business more efficient and help it make maximum profit, and new issues or IPOs, where these banks help new firms go public.