Maybe I don't understand. R U suggesting a buyout?
I think there would be a bidding war if Halozyme was a buyout target. Roche, Pfizer and Baxter obvious suitors. However, they do not want to go broke bidding for Halozyme. So it is a detente of sorts.
Kind of like all the opponents in a war agree a certain watering hole is neutral ground. Maybe I misunderstand your point.