大田金業讲故事：凯恩斯推衍生股市投资理论
相比马克思的短期炒股小游戏，经济学家凯恩斯的炒股经历则不仅很长，而且也能长期保持较好收获。凯恩斯在做经济学研究之余也常常在业余时间进行投资，他36岁时的资产只有约1.6万英镑，到62岁逝世时就已经达到约41万英镑了。在这些个人资产中，炒股盈利占了大头。不过，凯恩斯也不是常胜将军，但是在股海沉浮中的那份坚持让他常常能走出低谷。1928年他以1.1英镑的价格买入1万股汽车股票，不久这只股票一度跌至了5先令，但是凯恩斯没有自乱阵脚，他一直等待，到了1930年，终于等到股价回到他的买入价之上。
在股票市场，有一种理论叫“选美理论”，最早是有凯恩斯在研究不确定性时提出的，是说投资股票和选美比赛很像，股票的价格不仅和股票本身有关系，还和投资人如何评价这只股票或者说投资者认为别人（大部分其他人）如何评价这只股票有关系。简而言之，在股票市场中，大众的偏好很重要。
本文来源： 大田环球贵金属
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