I do not understand that. Can anyone explain why those calls haven't been exercised since they were so deep in the money
Depending when you sold those 7.5 calls - what the pps was.
May be some of those who bought the calls are waiting for :
* OE day, thinking pps will go higher from the time they bought (they may have sat on those calls in excitement, anticipating even higher pps than 28.xx only to be rudely surprised in less than a day to see those gains tank).
* Relaxing since they have time on their side - another 8 trading days (Feb 15 is a trading holiday due to President's day)
* Assuming that there will be another huge run up, one more time before OE, not to forget that there is a CC; a fond hope that it will thrust the pps into the 20s again
* Wont be surprised if a few assume that they can only exercise on OE day (like European Options)