How Stocks Work Full Size Version Share | Have A Question About This Topic? Name Email Address Message Thank you! Oops! 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. The Investment Risk No One’s Ever Heard Of You face a risk for which the market does not compensate you, that can not be easily reduced through diversification. Impact of Taxes and Inflation Estimate the potential impact taxes and inflation can have on the purchasing power of an investment.