Option holders commonly buy contracts to protect the value of a stock investment.

期权持有人通常买合约避免股票投资的价值。

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These investment biases consist of investor cognition bias of price fluctuation, the estimation bias of stock value, the management bias of risk and return, the operation bias of stock trading.

这种偏差包括投资者对于股票价格波动的认知偏差、投资者对股票价值的估计偏差、投资者对风险和收益的管理偏差和投资者在股票交易过程中的操作偏差。

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By comparing to the evaluation of stock value based on expected utility theory, the value of prospect theory-based evaluation model can better reflect the investment value of the stock.

通过和基于期望效用理论的评价对比发现基于前景理论的价值评价模型更能反映出股票的投资价值。

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Since 1946, Eisenstadt has worked at Value Line, publisher of the Value Line Investment Survey, where he developed a stock ranking system that has been the foundation of perhaps the most popular and successful independent investment advisory service in history.

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No other large cap stock comes close to positive expected value on any form of investment direct stock purchase, options, combinations.

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But a stock with a low price to book, some revenue or earnings growth, and some price appreciation, might attract interest from practitioners of 3 different investment styles so it would rank higher than the stock that just appeals to value investors.

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