Boards always want to keep their price of a share up because if it starts to decline, the company could become a takeover target; it's viewed as a failure etc., etc.

董事们想将股价维持在高水准上,因为股价一旦下滑,公司很可能会成为收购目标,被人看做是决策失误等等

耶鲁公开课 - 金融市场课程节选