What Can a Million Dollars Buy You? $1 million in a diversified portfolio could help finance part of your retirement. Share | Related Content The Rule of 72 Do you know how long it may take for your investments to double in value? The Rule of 72 is a quick way to figure it out. Best Performing Asset Classes Bonds may outperform stocks one year only to have stocks rebound the next. Saving for College This calculator can help you estimate how much you should be saving for college.