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
Intermountain Stock Exchange optimism by management, trading volumes continued to dwindle until the Exchange was acquired in 1986 and all ISE-listed securities were delisted. The company was acquired by Commodity Exchange, Inc. (COMEX) in 1986, ceased operating and became dormant. Intermountain Stock Exchange Intermountain Stock Exchange ("ISE") (formerly the Salt Lake Stock Exchange) is a defunct stock exchange that formerly operated in Salt Lake City, Utah. Named the Salt Lake Stock and Mining Exchange from its 1888 founding until 1972, the company was acquired by Commodity Exchange, Inc. (COMEX) in 1986, ceased operating and became dormant. The company was organized in 1888, and