Thomas Edison is the inventor of the ticker stock, a device used to record and transmit stock prices. He invented the ticker in 1869, which revolutionized the way stock prices were tracked and reported. The ticker was the first machine to record and transmit stock prices, allowing investors to make decisions based on real-time information. This invention made it possible for investors to buy and sell stocks quickly and efficiently. Edison's invention of the ticker stock revolutionized the stock market and changed the way people invest.