Philadelphia Stock Exchange options, and a number of FX options. The PHLX has more than 16% of United States market share in exchange-listed stock and ETF options trading. The exchange's normal trading sessions are from 9:30 am to 4:00 pm on all days of the week except Saturdays, Sundays and holidays declared by the exchange in advance. 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
Chicago Stock Exchange Chicago Stock Exchange The Chicago Stock Exchange (CHX) is a stock exchange in Chicago, Illinois. The exchange is a national securities exchange and Self-Regulatory Organization, which operates under the oversight of the U.S. Securities and Exchange Commission (SEC). The Chicago Stock Exchange is currently located at 440 South LaSalle Street (FOUR40). Founded on March 21, 1882, in 1949, the Chicago Stock Exchange merged with the regional stock exchanges St. Louis Stock Exchange, Cleveland Stock Exchange and Minneapolis-St. Paul Stock Exchange to form the Midwest Stock Exchange. In 1959, the New Orleans Stock Exchange became part of the Midwest Stock Exchange,