See, that very sentiment is not a good one to have if one is going to invest in individual stocks, IMO, especially pharmaceuticals. Stocks should be viewed as a long-term holding precisely because they are so volatile. Anyone who believes a stock will just go up and up and up and not have a fluctuations probably shouldn't be investing in individual stocks. In addition, pharmaceuticals have a third party involved, the FDA.
To view any stock as a short-term investment that must, to make you happy, hit a homer in a mere ten years and have no volatility is not very sound thinking, IMO. The reason you invested in Ariad, presumably, is because you believed in its leadership. You want to now change it to one of these hostile raider types??? Ugh. Not me: slow and steady, with emphasis on the science/product efficacy, NOT on the stock price and making stockholders happy sooner rather than later.