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
Los Angeles Stock Exchange Los Angeles Stock Exchange The Los Angeles Oil Exchange was a regional stock exchange in Los Angeles, California. Founded in 1899, in 1900 the name was changed to the Los Angeles Stock Exchange. In 1956, it merged into the Pacific Coast Stock Exchange. The Los Angeles Oil Exchange was organized in 1899 by a group of oil company owners, including Wallace Hardison. The Exchange’s first trading session was on February 1, 1900. In December 1900 the name was changed to the Los Angeles Stock Exchange. The Exchange absorbed the California Oil Exchange in September 1900 and the Los Angeles Nevada