Unexpectedly Intriguing!
December 12, 2017

Since the end of the first quarter of 2016, the S&P 500 has experienced a relatively stable period of order, where the variation of stock prices with respect to the mean trend curve established from the relationship between stock prices and their trailing year dividends per share has generally followed a standard normal distribution.

When we last reported on the status of the current period of order several months ago, the level of the S&P 500 had dropped to the point where stock prices were within one standard deviation of falling below a level that would indicate that the period of order was at very high risk of breaking down. Today, we can confirm that the S&P 500 has instead reverted back to the mean trend curve that defines its current period of order.

S&P 500 Index Value vs Trailing Year Dividends per Share, 30 September 2015 through 8 December 2017, with period of order since 31 March 2016

So in case you've ever wondered what "reverting to the mean" really means where stock prices are concerned, what has happened with the S&P 500 from 21 August 2017 to 8 December 2017 can be considered to be a textbook example of mean reversion.

And in case you're wondering what it means when stock prices move outside the outer limits described by this kind of analysis, where order really does break down (as opposed to simply being the result of statistical outliers in a continuing trend), the ultimate textbook example involves the ultimate sell signal.

Labels: , ,

About Political Calculations

Welcome to the blogosphere's toolchest! Here, unlike other blogs dedicated to analyzing current events, we create easy-to-use, simple tools to do the math related to them so you can get in on the action too! If you would like to learn more about these tools, or if you would like to contribute ideas to develop for this blog, please e-mail us at:

ironman at politicalcalculations.com

Thanks in advance!

Recent Posts

Stock Charts and News

Most Popular Posts
Quick Index

Site Data

This site is primarily powered by:

This page is powered by Blogger. Isn't yours?

CSS Validation

Valid CSS!

RSS Site Feed

AddThis Feed Button

JavaScript

The tools on this site are built using JavaScript. If you would like to learn more, one of the best free resources on the web is available at W3Schools.com.

Other Cool Resources

Blog Roll

Market Links
Charities We Support
Recommended Reading
Recently Shopped

Seeking Alpha Certified

Archives
Legal Disclaimer

Materials on this website are published by Political Calculations to provide visitors with free information and insights regarding the incentives created by the laws and policies described. However, this website is not designed for the purpose of providing legal, medical or financial advice to individuals. Visitors should not rely upon information on this website as a substitute for personal legal, medical or financial advice. While we make every effort to provide accurate website information, laws can change and inaccuracies happen despite our best efforts. If you have an individual problem, you should seek advice from a licensed professional in your state, i.e., by a competent authority with specialized knowledge who can apply it to the particular circumstances of your case.