I find the open interest (OI) for MNTA troubling. yesterday the volume and OI for Jan 2011 puts was approximately as below when I checked in afternoon yesterday - strikePrice volume OI 10 8201 7569 12.5 4005 7569
Today it is 10 30 15243 12.5 10 4814
It seems most of the volume at strike price 10 moved to OI, however the one at 12.5 seems somebody closed the position and opened new positions hence the 4k volume is not reflected in OI. Seems someone sees stock going to 10 before to 20. I am long MNTA, anybody has any alternative analysis of option play being setup here?
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