Sean, who is single, received social security benefits of $8,000, dividend income of $13,000, and interest income of $2,000. Except as noted, those income items are reasonably consistent from year to year. At the end of 2017, Sean is considering selling stock that would result in an immediate gain of $10,000, a reduction in future dividends of $1,000, and an increase in future interest income of $1,500. He has asked you for advice. What course of action do you recommend?