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
Königsberg Stock Exchange its second exchange, but it burned down in 1800. Kneiphof's third exchange was then constructed partially within the river in 1801. It was closed in 1875 because it was too small for the growing city. Kneiphof's fourth and final stock exchange opened in 1875 in Vordere Vorstadt, along the southern shore of the Pregel opposite the island of Kneiphof. The two-storied building was constructed by the Bremen architect Heinrich Müller from 1870–75. Emil Hundrieser designed its decoration, which included allegorical figures of Europe, Asia, Africa, and America along the roof and two lions at its steps. Königsberg's merchants considered the