What is the Shiller P/E Ratio? When discussing the Shiller P/E ratio we first have to discuss a typical P/E ratio. A normal P/E ratio is simply Price divided by Earnings. This is calculated by taking the current stock price and dividing it by the reported aum of the last four quarter’s worth of earnings per share. Take Apple for example: EPS over the past year has equaled $6.04 (per qtr earnings of $2.10, $1.24, … read more The Shiller PE Ratio