harsh on the favored "earnings trends." They encouraged investors to take an entirely different approach by gauging the rough value of the operating business that lay behind the security. Graham and Dodd enumerated multiple actual examples of the market's tendency to irrationally under-value certain out-of-favor securities. They saw this tendency as an opportunity for the savvy.

In Security Analysis, Graham proposed a clear definition of investment that was distinguished from what he deemed speculation. It read, "An investment operation