Your comment about trading in sympathy seems to be spot on...
It looks like today's action is similar in that FB*CD is once again getting hammered and $SNRY is following suit. Maybe a bunch of folks just own the Cooley portfolio and saw how bad FB performed once the merger was announced and are just dumping the other Cooley plays in advance.
As stated, let's hope it is not a SHITE partner or a SHITE space or BOTH!