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Instability is volatility (sigma). check it out.

http://answers.yahoo.com/question/index?qid=20100630193942AA...




I didn't even mention volatility or stability. I was challenging your assertion that risk was agnostic to direction. It is not.


Try this refresher on Risk and Uncertainty

http://economistsview.typepad.com/economistsview/2010/06/ris...




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