New York Stock Exchange - Open Board of Stock Brokers
Time: 1864
Place: 16 and 18 Broad Street, Manhattan, New York City, United States
Details: The Open Board of Stock Brokers was established in 1864 as a competitor to the NYSE. With 354 members, the Open Board of Stock Brokers rivaled the NYSE in membership (which had 533) "because it used a more modern, continuous trading system superior to the NYSE’s twice-daily call sessions".