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楼主 |
发表于 2009-7-1 01:24 AM
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it is not time decay, it is the volatility.
SRS decays way fast than QID/SRS. It is like (1+x)*(1-x) = 1-x^2, the bigger x is the more decay it gets. Well, Short 2x ETF decays even worse tha ...
dara 发表于 2009-7-1 01:45 
Don't know how u get this equation, and how it works out that way.
Let me put it this way, no matter what decay it will get, if the market downtrend is set up, SRS will be running up fast, especially when Real Estate has a big potential risk in a foreseeable future. |
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