The width of DIV is not the absolute value, but rather the minimum width.

DIV的宽度不是绝对的，而是最小宽度。

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String.sign Gets absolute, minimum, maximum and sign of string value -1.abs returns 1.

string . sign得到字符串值的绝对、最小、最大和sign值- 1 . abs返回1。

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The assumption that investors are absolute risk aversion, its value is designed to minimize the risks, which can be minimum variance under the hedging rate.

假定投资者是绝对的风险厌恶者，其保值的目的是为了将风险最小化，由此可以得到最小方差下的套期保值比率。

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