Poisonpill is known by the public afterSinaset uppoisonpillasdefensetactic against Shengda purchasing its stocks by tender offer, butinhome there is no systematicstudyonpoison pill.
He might even resort to ImClone's poison-pill defense, which makes a takeover impossible by flooding the market with new shares if a buyer acquires more than 19.9% of the stock without the board's approval.
This morning, Netflix announced that it has adopted a poisonpill shareholder rights plan as a defense against unfriendly attempts to take control of the company.