American stock trader known as the "Great Bear of Wall Street" who became known for winning and losing several large fortunes.
He began trading stocks at the age of fourteen after running away from home.
He published the book How to Trade in Stocks: The Livermore Formula for Combining Time Element and Price in 1940.
He was married to Nettie Jordon from 1900 to 1917 and later married Dorthea Wendt, with whom he had two children before they divorced. Harriett Metz Noble was his third wife.
He and entrepreneur William Durant were both affected by the Stock Market crash of 1929.