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Another Options Thread

the third bar is the measure i outlined above. the correlation between this bar and the close-close HV is actually 0.9855, which is a bummer as I was actually looking to find differences between close-close HV and frequency of useable movement...

You should probably run a regression, rather than a correlation figure...
 
So far we have addressed measurement errors in realized vol, in which we are trying to forecast.
As seen by vi's alternate measure, different measurements could yield relationships that do/don't exist [data and statistical errors aside].

It has been widely documented that iv compared to hv, is the better predictor of rv [exogenous regressors not included].
I understand that the following material will not be in some people's scope, but it is something to think about.

Firstly, it is taken for granted that iv is backed out of the Black Scholes model. But what about iv being backed out of more "accurate" pricing models e.g Heston? Does this iv have > information than the one coming from BSM?

Finally, once it is decided which iv measurement to take, is it simply taking the atm implied vol as the implied figure? What about factoring in skew [tenor and horizontal]?
 
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