what s the difference between a white knight and poison pill 
white knights and poison pills are two defensive strategies that target firms can use to avoid being taken over by an unfriendly acquirer a white knight involves a friendly investor or company who makes a better offer to purchase the target and prevent the unfriendly bidder from gaining control a poison pill on the other hand is used by a target by buying back enough outstanding shares to block an acquirer from gaining a majority and therefore control 