Quote from heech:
I don't see how change in price of your options has *anything* to do with that drop. Zero, zip, nothing.
As others said, it's because of implied volatility that your options were so rich in the first place. As of two days ago, DNDN could've gone to either 0 or 100 as soon as the news broke... therefore, options were extremely rich.
Immediately upon the news being known, we knew the price wasn't going to 0 or 100, and implied volatility went poof.
Again, *nothing* to do with the drop in price. Only those who bought/sold within that quick drop were affected by it.