So that would at least partially explain the market's wacky P/E ratio this year - the Q1 P/E ratio (using the 3/31 close of 798) was 116. Using trailing 4-quarter earnings through Q1 with the 6/24 closing price of 901 gives a P/E of 131. See the excel file - http://www2.standardandpoors.com/spf/xls/index/SP500EPSEST.XLS
Earnings are terribly volatile, and momentary trailing four-quarter earnings, are insufficient for prudent decision-making.
The problem, however, is that it looks very like we are in a secular, or long-term, bear market that started in 2000. These periods have lasted 17-20 years and have ended with p/e ratios in the single digits. So we may have a long way to go.
Assume 4% earnings growth from here in a low-inflation world, and average p/es, and the S&P 500 will not regain its 2000 high until 2018. Assume a high inflation world and earnings growth will be higher, but the p/e will be lower (historically there has been an inverse relationship between inflation rates and p/es). That would leave the market still below its 2000 high in 2020.---
Source:
The Economist. The long view.
The Economist. June 24, 2009.
http://www.economist.com/blogs/buttonwood/2009/06/the_long_view.cfm
© 2009 Michael Cale

