当因子指数改写自身规则：因子投资中的方法论风险
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你选择了一只价值指数基金。你研究了该策略。你认同购买廉价股票的逻辑，并进行了长期投资。然而，随后该指数……
You picked a value index fund. You read about the strategy. You liked the logic of buying cheap stocks, and you invested for the long term.
And then, the index...