I am/was going to try to track the SI options behavior but between May, Jul, Sep, Dec there was no clear picture and it is (so far impractical) to try to track them all.
Looks like the main OI in the options is out in Dec 11.
Anyway, the options just caught my interest as I have no clue as to why they trade the way they do. I think the high OI in the Mar 11 has a lot to do with an expected sell off in SI.
It is difficult to track things. Basically I have "last trade" data, but it is not dated. So will not change until a trade occurs.
Am cleaning house and selling off things. Did not make it before the Snow flew up there. I am out of here come spring !!