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
Spokane Stock Exchange on May 24, 1991. At the time it closed “because of slumping silver and gold prices and waning investor interest,” it was the smallest stock exchange in the United States. It was the smallest of seven regional “penny stocks” market. At the time of its closure it had a reputation as a haven for trading speculative penny stocks, almost exclusively in mining metals stocks of the Silver Valley in nearby north Idaho. Spokane Stock Exchange The Spokane Stock Exchange was a regional stock exchange in the northwest United States, located in Spokane, Washington. Founded mainly to trade stock of mining