In 1923 the Trans-Lux company came out with the “movie ticker” — a large illuminated screen showing rapidly changing stock prices. For the first time, a crowd at a retail brokerage could watch together as a facsimile of the stock ticker tape whizzed by in bright light. And they heard about the stock market on the radio, the hot new technology of that era. Westinghouse, in Pittsburgh, created one of the world’s first commercial radio stations, KDKA, which broadcast Warren G. Harding’s victory in the presidential election on Nov. 2, 1920. Sports events, comedy shows and stock market reports soon followed, and radio stations spread throughout the United States and the world.

Source: New York Times April 16, 2021 13:00 UTC