关于证券的价值，Gerald Loeb在《The Battle for Investment Survival》中写道:
There is no such thing as a final answer to security values. A dozen experts will arrive at 12 different conclusions. It often happens that a few moments later each would alter his verdict if given a chance to reconsider because of a changed condition. Market values are fixed only in part by balance sheets and income statements; much more by the hopes and fears of humanity; by greed, ambition, acts of God, invention, financial stress and strain, weather, discovery, fashion and numberless other causes impossible to be listed without omission.
via: The Money Game