1 Day AAPL 0.16% DJIA 0.16% S&P 500 0.24% Technology -0.39% The Price to Earnings (P/E) ratio, a key valuation measure, is calculated by dividing the stock's most recent closing price by the sum ...

Jeff Carlson writes about photography and technology and is the author of dozens of how-to books covering a wide spectrum ranging from Apple devices ... social media -- a rainbow of colors ...