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为了分散风险,投资者在金融市场上,一般不会只购买一种资产。如果资产选择得当,资产之间会提供一种套期保值的机会。我们可以引用协方差与相关性的概念来量化资产的套期保值。协方差是测
To distract investors, investors generally do not buy only one asset in financial markets. If the assets are properly chosen, the assets provide a hedging opportunity. We can use the concept of covariance and correlation to quantify the hedging of assets. Covariance is measured