SP 500 Price Change Frequency Distributions
Richard Shaw (October 22nd, 2009) Writes:
This article presents the shape of the price change frequency distribution for the S&P 500 over approximately six decades on a daily basis, monthly basis and calendar year basis.
The degree of “normality” of S&P 500 price changes is high on a daily basis — it’s visually symmetrical. The average change of 0.03% is less than the median change of 0.05%.
The monthly distribution is not as visually smooth or symmetrical, but presents a “pretty” good bell shaped curve. The average change of 0.67% is less than the median change of 0.91%.
The calendar year distribution requires a bit of squinting and some imagination to see a bell shaped curve — making it “sort of” normal looking. The average change of 8.02% is less than the median of 9.76%.
The most extreme outliers, as measured by standard deviation, are at the daily level, then monthly and lastly calendar year.
click images to
...China, Developed Markets, Investing Lessons, Market Commentary, QVM Group LLC, Richard Shaw, Sp 500


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