陈同学2023-01-14 12:00:03
这个题用公式怎么推? current obserable vol = w1 * true vol + w2 * previous observable vol. vol = reits vol,好像看不出true vol > observable vol
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Johnny2023-01-17 21:41:59
同学你好,文中所了The model assumes that the current observed return equals the weighted average of the current true return and the previous observed return.那么这个模型就是下图中的(15),而根据(16)我们就能得出true variance会大于observed data
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