Given that Dov Pharmaceuticals was down by 98% for 2006, why did some investors hold the stock? Why didnt they sell out before the price declined so sharply?

(Answer should be approximately 150 words)

Your stock investments return 8%, 12%, and -4% in consecutive years. What is the geometric return? What is the sample standard deviation of the above returns?

Using the standard deviation and mean that you just calculated, and assuming a normal probability distribution, what is the probability of losing 3% or more?