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Cindy2022-07-11 20:38:45
同学你好,因为题目说,The current estimate of daily volatility is 1.5%. 题目让我们算的是 the updated estimate of volatility,所以如果updated estimate of volatility是第n天的话,那么 current estimate of daily volatility就是更早一天的数据,也就是n-1了
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