On Monday I posted an unusual 86K call buyer on $CDTX; they paid $276 per contract. Thursday evening, $MRK announced a $9.2B buyout of $CDTX at $221.50/share. This morning these contracts opened at $8,716 each, and they sold their position for roughly $3M. In just 5 days, this https://t.co/74oGDXrZAA