The American Stock Exchange (the "Curb Exchange") re-created their early days for this film.[1] See all the hand signals, and the history. Which is very funny. The Curb Exchange operated in New York City streets for well over two decades, until they finally got a building in 1921 and moved indoors.<p>[1] <a href="https://archive.org/details/md-87554-behind-the-ticker-tape-color-vwr" rel="nofollow">https://archive.org/details/md-87554-behind-the-ticker-tape-...</a>