There are Five Commercial Banks in the country and two largest banks are the Bank of Bhutan and the Bhutan National Bank which are based in Thimphu. Other commercial banks are Bhutan Development Bank, T-Bank and Druk Punjab National Bank. The country's financial sector is also supported by other non-banking Financial Institutions. They are Royal Insurance Corporation of Bhutan (RICB), National Pension and Provident Fund (NPPF), and Bhutan Insurance Limited (BIL). The central bank of the country is the Royal Monetary Authority of Bhutan (RMA). The Royal Securities Exchange of Bhutan is the main stock exchange.