Pfizer Inc. (NYSE:PFE) is reportedly in talks to buy ACADIA Pharmaceuticals Inc. (NasdaqGS:ACAD) for $44 per share. Acadia Pharmaceuticals (NASDAQ:ACAD) is currently higher by 9%. The buyout talks have often centered around Acadia, but it has been a while since its stock saw such a big intraday move behind acquisition chatter.

The rumor first broke on Twitter when a well-respected twitter personality known as Option Runners took the rumor and put it on blast.