I don't think there are any trigger points, as far as the control group is concerned. I believe most of the control group, as you pointed out, have expired before the end of last year.
I think they picked %80 percent, but if patients are living longer they may have settled for less.
It does not have to be %80 percent, but would achieve a more accurate number - when calculating Median Overall Survival. I think it was mentioned they will report, whether they reach the trigger point or not! I hope they have not reached this number in the Bavi arm!
I hope we see some data between Tuesday morning and Wednesday. I am sure the stock will be halted. They could release data during the day. It's not unheard of! They can avoid a halt, if news released before 7:00am Eastern Time or after 8:00pm.