Jesse Lauriston Livermore, American investor and security analyst, "Great Bear of Wall Street" (died 1940)

Jesse Lauriston Livermore was an American stock trader. He is considered a pioneer of day trading and was the basis for the main character of Reminiscences of a Stock Operator, a best-selling book by Edwin Lefèvre. At one time, Livermore was one of the richest people in the world; however, at the time of his suicide, he had liabilities greater than his assets.