apparently not as huge as one might think. If this was significant there would have been a bigger rise in price. The news has had plenty of time to be digested by the street... and nothing happened.
This is a non-event unfortunately.
Your best bet is the clinical trials dot gov site. Click on history of changes and then go to the archive site. There is a color key on the bottom explaining the changes and if you click the actual date on top, you will see a clearer presentation of the trial.