Abstract: A method of encoding stock market data and transmitting such data via radio to a plurality of one-way receivers via an SCA channel on a commercial FM station transmits both a cyclical repetitive loop of all the stocks listed on a particular exchange including parameters of their open, high, low and last prices. During actual trading hours, the current trade values are also inserted on a real-time basis in the loop. The receiver is automatically and immediately updated by means of its storage capacity. To provide a short cycle of operation, data is compressed by dividing the stocks into groups determined by a binary offset from the last price compared to open, high and low and also by the maximum last sale price.