Is Exelixis Stock Engineered To Make You Money?

Exelixis (EXEL) stock has returned 46% over the past twelve months, compared with 17.8% for the S&P 500. The company has aggressively repurchased its own stock, reducing its total share count by 21% over the last three years. Because fewer shares remain in circulation, each one lays claim to a larger slice of the profit. So how much is that buyback adding to each Exelixis share you own.