Investors use the normal probability distribution of a stock's past returns to make assumptions regarding expected future returns. In addition to teachers who use a bell curve when comparing test ...

In the past few months when we’ve tried to make a little sense of random numbers ... In Powerball, that contributed to making an oddly organized, bell-shaped curve on Nov. 11.

Value changes in your stocks, your portfolio, or an index can keep you up at night or, worse, push you to make emotional decisions ... assumptions of a normal bell curve. When data is normally ...

Investors use annualized volatility to compare risk and make informed choices ... Assuming a normal distribution -- a bell-shaped curve that assumes 68% of variables are within one standard ...