The American Stock Exchange (amex uamy at https://www.webull.com/quote/amex-uamy) is called as NYSE American. It was a mutual organization previously and Owen by its members only. Till 1953, it was called as New York Curb Exchange. In 1908, they create a trading rule for curbstone brokers, it was organized by Mendels. In 1910 only the informal curb was formed to weed out undesirables.