“Everybody I’ve seen thinks just as you do. Each one has covered because he thinks everybody else is short—still the market doesn’t rally much. I don’t believe there’s much short interest left, and if that’s the case we shall get another break.” “Yes, that’s what they all say—and they’ve all sold short again because they think everybody else has covered. I believe there’s just as much short interest now as there was before.” It is evident that this series of inversions might be continued indefinitely. These alert mental acrobats are doing a succession of flip-flops, each one of which leads up logically to the next, without ever arriving at a final stopping-place. The main point of their argument is that the state of mind of a man short of the market is radically different from the state of mind of one who is long. Their whole study, in such a conversation, is the mental attitude of those interested in the market. If a majority of the volatile class of in-and-out traders are long, many of them will hasten to sell on any sign of weakness and a decline will result. If the majority are short, they will buy on any development of strength and an advance may be expected. The psychological aspects of speculation may be considered from two points of view, equally important. One question is, What effect do varying mental attitudes of the public have upon the course of prices? How is the character of the market influenced by psychological conditions? A second consideration is, How does the mental attitude of the individual trader affect his chances of success? To what extent, and how, can he overcome the obstacles placed in his pathway by his own hopes and fears, his timidities and his obstinacies? These two points of view are so closely involved and intermingled that it is almost impossible to consider either one alone. It will be necessary to take up first the subject of speculative psychology as a whole, and later to attempt to draw conclusions both as to its effects upon the market and its influence upon the fortunes of the individual trader. As a convenient starting point it may be well to trace briefly the history of the typical speculative cycle, which runs its course over and over, year after year, with infinite slight variations but with substantial similarity, on every stock exchange and in every speculative market of the world—and presumably will continue to do so as long as prices are fixed by the competition of buyers and sellers, and as long as human beings seek a profit and fear a loss.[1]