Taipei Exchange, formerly the GreTai Securities Market (GTSM), is a non-profit foundation set up to manage over-the-counter (OTC) market and bond trading in Taiwan. It was founded on 1 November 1994. The initial fund of the foundation was contributed by the Taiwan Stock Exchange, Taiwan Securities Association, and Taiwan Depository & Clearing. Its headquarters is in the Zhongzheng District of Taipei City. In February 2015, the Gre Tai Securities Market changed its name to Taipei Exchange. The exchange has normal trading sessions from 9 am to 2 pm and post-market sessions from 2 pm to 2.30 pm on all days of the week except Saturdays, Sundays and holidays declared by the Exchange in advance.