Philadelphia Stock Exchange that the tax was illegal, and the PHLX moved its trading floor back to its headquarters in the city. In 1981, the exchange moved to 19th and Market, where it stayed until 2017 when it moved to its current location in the newly built FMC Tower. The exchange merged with the Baltimore Stock Exchange in 1949. The exchange was then named the Philadelphia-Baltimore Stock Exchange. The Baltimore Stock Exchange then migrated out of its Baltimore Stock Exchange Building, later renamed the Totman Building, to a new home base in Philadelphia. The exchange merged with the Washington Stock Exchange in 1954.
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