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First editionThe work was first published in 1934, following unprecedented losses on Wall Street. In summing up lessons learned, Graham and Dodd scolded Wall Street for its focus on a company's reported earnings per share, and were particularly 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.[citation needed]
In Security Analysis, Graham proposed a clear definition of investment that was distinguished from what he deemed speculation. It read, "An investment operation is one which, upon thorough analysis, promises safety of principal and an adequate return. Operations not meeting these requirements are speculative."[3]
A number of financial terms were coined in the book. For example, Graham and Dodd coined the term margin of safety in Security Analysis.[citation needed] It is not known when the Period of financial distress phrase was first used or by whom. However, it or phrases closely equivalent were almost certainly first used in connection with the theory of value investing as developed initially by Graham in Security Analysis in 1934.[ci图标，上传附件后可设置现金定价
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