Ticker tape was the earliest electrical dedicated financial communications medium, transmitting stock price information over telegraph lines, in use from around 1870 through 1970. It consisted of a paper strip that ran through a machine called a stock ticker, which printed abbreviated company names as alphabetic symbols followed by numeric stock transaction price and volume information. The term "ticker" came from the sound made by the machine as it printed.
The ticker tape revolutionized financial markets, as it relayed information from trading floors continuously and simultaneously across geographical distances.[1] Paper ticker tape became obsolete in the 1960s, as television and computers were increasingly used to transmit financial information. The concept of the stock ticker lives on, however, in the scrolling electronic tickers seen on brokerage walls and on news and financial television channels.
Ticker tape stock price telegraphs were invented in 1867 by Edward A. Calahan, an employee of the American Telegraph Company who later founded The ADT Corporation.[2][3]
^Handel, John (2021). "The Material Politics of Finance: The Ticker Tape and the London Stock Exchange, 1860s–1890s". Enterprise & Society. 23 (3): 857–887. doi:10.1017/eso.2021.3. ISSN 1467-2227.
^Technical Analysis: The Complete Resource for Financial Market Technicians. FT Press. 2010-11-15. ISBN 978-0-13-705944-7.
^Picker, Leslie (February 16, 2016). "ADT in $6.9 Billion Deal to Sell Itself to Apollo Buyout Firm". The New York Times.
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