Who is the Unnamed Friend from Reminiscences of a Stock Operator and what is their importance?

Livingston has an unnamed friend who vacations with him, and is also a stock trader. This friend is usually mentioned as a witness to some of his stranger trading events (such as when Livingston anticipates the San Francisco earthquake through a hunch) or in conversation when Livingston pulls off some especially stunning coup in the market. The two seem to share an equal interest in relaxation, food, the good life, and trading, though his friend holds his trading skills somewhat in awe. Livingston's friend loves to tell exaggerated stories about how Livingston has wild hunches that lead to him making millions of dollars.