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- UID
- 217812
- 帖子
- 300
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- 2011-5-24
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- 2012-9-12
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from what i know, its just about how you decide to model volatility
a common way is to do down=1/up
CFAI could be using some other model and giving you the up and the down, so just use what they give you |
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发表于 2011-7-11 19:59
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