Are they normal distributed or not? Quantiles of Normal 100,000,000 90,000,000 80,000,000 70,000,000 60,000,000 50,000,000 40,000,000 30,000,000 20,000,000 10,000,000 20,000,000 50,000,000 80,000,000 Quantiles of CLOSE .08 06 104 .02 Quantiles of Normal .00 -02 ..04 -.06 08 3 - 2 -1 0.1 2 3 Quantiles of LOG RETURN