Vitaliy Katsenelson: The pain of mean reversion
Prieur du Plessis (February 19th, 2009) Writes:
This post is a guest contribution by Vitaliy N. Katsenelson*, author of Active Value Investing: Making Money in Range-Bound Markets and director of research at Investment Management Associates.
The stock market has dropped. Corporate profits have collapsed. And profit margins have reverted toward the mean. What is next?
Before I dive into the discussion, let me explain the chart below, which I named appropriately, “The pain of mean reversion.”
I looked at reported earnings for S&P 500 and compared them to the “average case” earnings scenario. In the “average case” scenario I took reported earnings of S&P 500 in the early 1990s and grew them at 6% – an average growth rate of GDP over the last century which happens
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