Philadelphia Stock Exchange Philadelphia Stock Exchange Philadelphia Stock Exchange (PHLX), now known as NASDAQ OMX PHLX, is the oldest stock exchange in the United States. It is now owned by The NASDAQ OMX Group. Founded in 1790, the exchange was originally named the Board of Brokers of Philadelphia, also referred to as the Philadelphia Board of Brokers. In 1875, the Board of Brokers changed its name to the Philadelphia Stock Exchange. The exchange merged with the Baltimore Stock Exchange in 1949 and was named the Philadelphia-Baltimore Stock Exchange. It merged with the Washington Stock Exchange in 1954, becoming known as the Philadelphia-Baltimore-Washington Stock
Stockholm Stock Exchange its Nasdaq Nordic markets. As of October 2014, the exchange operated under the legal name "Nasdaq OMX Stockholm AB" (renamed "Nasdaq Stockholm AB" in 2015). Prior to the introduction of electronic trading on 1 June 1990, all trading was conducted on the floor of the Stockholm Stock Exchange Building. Its normal trading sessions are from 09:00am to 05:30pm on all days of the week except Saturdays, Sundays and holidays declared by the Exchange in advance. Stockholm Stock Exchange The Stockholm Stock Exchange (), operating under the name Nasdaq Stockholm, is a stock exchange located in Frihamnen, Stockholm, Sweden. Founded in