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Spx closed outside 3 sigma today


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#1 risk_management

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Posted 04 August 2011 - 08:05 PM

From Hamzei's table.... Sigma channel +3 to -3 Probability of asset price travel 99.73002% So i'd rather place my money on some reversion to the mean tomorrow rather than on fat tail.

#2 DrSP

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Posted 04 August 2011 - 09:18 PM

From Hamzei's table....

Sigma channel +3 to -3
Probability of asset price travel 99.73002%

So i'd rather place my money on some reversion to the mean tomorrow rather than on fat tail.


Same with VIX. In the last 10 years, VIX closed 10 times outside 3 sigma. 9 times we had significant drop in VIX next day.
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#3 jjc

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Posted 04 August 2011 - 10:38 PM

From Hamzei's table....

Sigma channel +3 to -3
Probability of asset price travel 99.73002%

So i'd rather place my money on some reversion to the mean tomorrow rather than on fat tail.



What is the sample size (How long a moving ave)?

#4 thespookyone

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Posted 04 August 2011 - 10:55 PM

With 20 to 1 negative breadth today, if you are up by the close tomorrow-it won't be by very much. The risk reward doesn't work for me here on the long side tomorrow.