Merchant banks specialize in various types of financing including bills of exchange, hire purchase, installment buying, international trade, and long-term loans. They also provide advisory services around acquisitions, mergers, and takeovers. Originally started in the Middle Ages by Italian grain merchants to finance long trading journeys, merchant banks now offer services like project counseling, loan syndication, issue management, portfolio management, and advisory services relating to mergers and acquisitions. Merchant banks are regulated by the Securities and Exchange Board of India and must obtain authorization to provide various merchant banking services.