The Trade and Development Bank (TDB) of Mongolia (Mongolian: Худалдаа Хөгжлийн Банк, Khudaldaa Khögzhliĭn Bank) is a commercial bank located in Ulaanbaatar. It is the oldest, as well as one of the largest banks in Mongolia. It was founded in October 1990 and currently has a total of 97 branches throughout the country.