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
New-York Mining Stock and National Petroleum Exchange New-York Mining Stock and National Petroleum Exchange The National Petroleum Exchange was a resource exchange in New York City founded in 1882. In 1883 the National Petroleum Exchange and the New York Mining Stock Exchange were consolidated, becoming the New-York Mining Stock and National Petroleum Exchange. After several other exchange mergers with competitors, the exchange became the Consolidated Stock and Petroleum Exchange of New York, which in 1885 became the Consolidated Stock Exchange of New York. On December 18, 1882, the National Petroleum Exchange was opened. Sales that day equated to 150,000 barrels. On March 24, 1883, the New-York Mining