When I read this article, the first thing I thought of was John Taylor Gattto, a man voted Teacher of the Year who had to resign out of conscience. I was lucky enough to spend a weekend with Mr. Gatto at a conference. Very enlightening.
Here are Sony's options on Nov 3, 2014
Open Interest for Puts is in Magenta
Note that the $17 Strike for January has an Open Interest of 17.6K
http://i.imgur.com/OmglyLl.png
Here are Sony's Options on Nov 25, 2014, the day after the hack.
Note the same $17 put has actually lost a little Open Interest. No conspiracy here.
http://i.imgur.com/dCRcvX9.png
Caveats:
This was done with the US traded instrument (SNE). I don't have access to the Japanese exchange.
Open Interest is reported after the day it is generated and reflects the secondary market of the previous day.
