What's the highest IV in the past? Why?

Quote from OddTrader:

Put it this way: Do you think IV>200 is possible at any time?

http://elitetrader.com/vb/showthread.php?s=&threadid=107466&perpage=40&pagenumber=3
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In Oct 1987, IV reached the level of 150. Pretty much no one was willing to sell anything at any price.

That will never happen again. More sophisticated now. More firms with deep pockets trading, and if things got that bad, my guess is that the markets would be closed for a chance to regroup.

I do NOT think IV 200 is possible for the VIX. It's obviously possible for individual stocks.

I remember that Monday well. Biggest loss I ever had.

Mark
 
Quote from OddTrader:

Put it this way: Do you think IV>200 is possible at any time?
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Yes, it has happened with pending announcements . In my experience, most often just before FDA clinical trials approval/rejection.

And it happens elsewhere as well. Martha Stewart's company was way up there when she was on trial for the insider trading gig... I think in the mid 200's.
 
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