The oldest stock exchange in the United States being founded in 1790. It is now known as NASDAQ OMX PHLX (purchased by NASDAQ OMX in 2008). PHLX has a strong presence in option trading.

The stock tumbled a whopping 72% Wednesday, following a 2,230% surge in Newsmax’s first two days of trading after debuting on the New York Stock Exchange.

PHILADELPHIA, Penn., Dec. 29. -- The Philadelphia Stock Exchange had its first session in its new building to-day, and, as usual when it makes a change in abode, it did so on a declining market.

Major regional stock exchanges such as the Philadelphia Stock Exchange, the Boston Stock Exchange, and the Chicago Stock Exchange, merged into either the Nasdaq or the NYSE after the SEC ...

PHILADELPHIA, Monday ... Pennsylvania Raillroad, 41 1/2; Sight Exchange on New-York at par@1-10 cent. discount. Advertisement ...