You are probably taking a loss or counting pennies if you were buying stock in the last 4 days and selling yesterday night.
Apparently this event was priced in few weeks in advance. It makes sense as yesterday we didn't really get anything new except from a few details, price (big one) and initial partners.
Best strategy as usual appears to be long term buy & hold. But we might still see fireworks with the ER (fireworks sometime explode in your hands though).
How many times did I post "stay calm, don't be greedy" in the last few weeks? Did I follow my own advice? Of course not :-D