John, I think it will be interesting to see if market believes that AZN will come with higher offer, or that the deal is not going to happen and ONXX retrieve to $120. Also option expiration in 2 days will play some role. I think that at this point we're going down to $120, but then, in couple days the agreement will be made and we're sold at $130.
The one thing that is unclear to me in all that story is ONXX position: if the deal is done why'd they care about delay in approval? It would be already not their problem! My interpretation: they don't want to sell at all or at that price.