The S&P 500 PE ratio is an important determinant of the value of stock market and the trend of the S&P 500. Historically, the S&P 500 PE ratio has a median of 15.7. The S&P PE ratio is 139 based on a closing price of 1,044 on Friday, September 11, 2009. This assumes the trailing earnings for the S&P 500 companies as reported by Standard & Poor’s for the four quarters ending June 30, 2009. A PE ratio at 139 is not sustainable. What is a reasonable PE ratio for the S&P 500 given our current situation?
The S&P 500 PE ratio reflects the performance expectations of the stock market. In the last three quarters, the PE ratio has leapt higher with the plunge in earnings of the S&P 500 companies. The fall in earnings overcame the drop in the value of shares in early March 2009.
Even with the recovery in the markets since the lows in March, the S&P 500 PE ratio remains very high as the trailing four quarters of earnings is so low. According to data from Standard & Poor’s on the S&P 500, as reported earnings for 99% of all reporting companies, creates an S&P 500 PE ratio of 122.41 as of June 30, 2009. The trailing four quarters of earnings was $7.51. Two years ago the as reported earnings for the S&P 500 companies was $84.92 for the quarter ending on June 30, 2007. The S&P 500 PE ratio was 17.70. This plunge in earnings is what caused the S&P 500 PE ratio to rise so high.
As shown on the chart below, the S&P 500 PE ratio rose to 122 for the quarter ending June 2009. The estimates through the end of 2010 are from Standard & Poor’s for earnings and the S&P PE ratio.
The U.S. has had three recessions since 1988 according to the National Bureau of Economic Research, the group that determines when the U.S. has had a recession. These recessions are depicted in red in each of the charts shown here.

Standard & Poor's has forecast earnings through the end of 2010. The chart below shows actual trailing annual earnings since the June 1990 through June 2009. It also includes the forecast for earnings through December 2010.
What stands out is the sudden jump in earnings that begins with the quarter ending December 2009. Part of this sudden change is due to the large drop in earnings reported for December 31, 2008. For the quarter ending December 31, 2009, the S&P 500 delivered $23.25 in losses for that quarter alone due to the large write-offs in the financial sector.
Once the major write-offs are no longer part of the four-quarter trailing earnings, the annual earnings return to a forecasted $41 to $45 range for the S&P 500. This earnings forecast provides a basis to project what the S&P 500 index could achieve over the next 12 - 15 months.

In the recession of 1990 – 1991, the S&P index began to climb before the end of the recession. Following the end of the 2001 recession, the S&P 500 fell another 200 points before rebounding. So far in the recession of 12/2007 - ?, the S&P 500 fell significantly and has turned up through June 2009. We know it is trading above 1,000 as of the middle of September 2009.

Looking at the earnings forecast from Standard & Poor’s we can assess which way the S&P 500 will likely move for the remainder of 2009 and all of 2010.
The table below uses the trailing four-quarter earnings from Standard & Poor’s. It then applies a PE ratio to derive the S&P 500 index forecast. When looking at the table, keep in mind that the median PE ratio is 15.7. In addition, the PE ratio is mean reverting, so we should expect it to fall further, possibly to 15 or lower. The very low S&P trailing earnings for June and September 2009 are due to the large loss reported in December 2008 quarter.

Using the December 2009 quarter the earnings forecast $39.35 and a PE ratio of 30 gives us a target price for the S&P 500 index of 1,181. On Friday September 11, 2009, the S&P closed at 1,044. A PE ratio of 25 gives us an S&P 500 index of 984. If the S&P 500 PE ratio remains between 25 and 30, we should see the S&P 500 index climb to a range of 1,146 to 1,375.
This examination of earnings and S&P PE ratios is telling us to expect a higher S&P 500 index throughout 2009, as long as the PE ratio remains in the 25-30 range. Whether this is correct, depends on several factors. First, are the earnings forecast correct? Investors should monitor earnings expectations throughout the year, looking for any changes either up or down. The estimates for all of 2010 are higher now than they were in June, indicating S&P is expecting a more robust recovery.
Second, evaluate your PE ratio assumptions based on the outlook for the economy and the markets. If earnings are running above the forecast from Standard & Poor’s, then you should could expect the PE ratio to hold in the 25 - 30. On the other hand, if earnings expectations are falling, then you should expect the PE ratio to fall further. In each case, any move in the PE ratio will cause a significant move in the S&P 500 index.
Yale University Professor Robert J. Shiller, author of Irrational Exuberance: Second Edition uses a modified PE ratio that smoothes out the volatility in the ratio. The denominator of this modified ratio is average inflation-adjusted earnings over the trailing 10 years. Shiller calls this modified ratio "p/e10." Using this data the modified ratio “p/e10” produces a PE ratio of slightly over 15, which is very close to the median of 15.7. In December 2007, the beginning of the current recession, the “p/e 10” was 25.95. Since markets tend to cycle above and below the median, we should expect the “p/e 10” to fall further before turning back up.
Using December 2009 trailing four-quarter earnings of $39.95 times the median PE ratio of 15.7 gives us an S&P 500 index of 627. This gives us a range for the S&P index of a high of 1,375 assuming an S&P PE ratio of 30 to a low of 675 with a PE ratio of 15.7, the median. The risk is to the down side.
Investors still need to understand if the S&P 500 PE ratio will rise or fall. If Professor Shiller is correct, then we should look for a drop in the S&P 500 PE ratio. On the other hand if the current PE ratio remains in the 25 - 30 range, then we could see the S&P 500 index rise further driven only by higher earnings.
For investors a PE ratio in the 25 to 30 range means it will be difficult to find bargains, as you cannot expect an expansion of the PE ratio to contribute a higher level on the S&P 500 index. Moreover, there is a risk the S&P PE ratio could contract, causing the level of the S&P 500 index to fall. A drop to 20 on the S&P 500 PE ratio gives us a high of 917 on the S&P 500, assuming earnings does not change from its forecast. Going forward investors need to keep in mind that the risk of a PE ratio contraction is a possibility. A rise in the S&P 500 PE ratio is unlikely.
S&P 500 PE Ratio - September 2009 Review
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Shalom Patrick Hamou- 2010/09/26 11:52:57 am
_______________________________ Tract on Monetary Reform _______________________________ Our economy is slowly dying, your job, lifestyle are dominated by anxiety. The economy is kept alive artificially. No one is proposing a solution because no one has the slightest idea of why it is happening and many have vested interest in the present system. However an objective observation of the phenomenon can help us understand it and provide us with an innovative solution. Of course we can't solve the problem with the tools that brought us there in the first place and we need a new ideology. _______________________________ - Do you feel that your ideology pushed you to make decisions that you wish you had not made? - Well, remember that what an ideology is, is a conceptual framework with the way people deal with reality. Everyone has one. You have to -- to exist, you need an ideology. The question is whether it is accurate or not. And what I'm saying to you is, yes, I found a flaw. I don't know how significant or permanent it is, but I've been very distressed by that fact. - You found a flaw in the reality...(!!!???) - Flaw in the model that I perceived is the critical functioning structure that defines how the world works, so to speak. - In other words, you found that your view of the world, your ideology, was not right, it was not working? - That is -- precisely. No, that's precisely the reason I was shocked, because I had been going for 40 years or more with very considerable evidence that it was working exceptionally well. _______________________________ In order to alleviate those economic woes wee need to create, as fast as possible, a new credit free currency that will solve the credit crunch and bring incremental jobs, consumption and investments to the present system. An Innovative Credit Free, Free Market, Post Crash Economy Tract on Monetary Reform It is urgent if we want to limit social, political and military chaos. _______________________________ Is the fulfilment of these ideas a visionary hope? Have they insufficient roots in the motives which govern the evolution of political society? Are the interests which they will thwart stronger and more obvious than those which they will serve? I do not attempt an answer in this place. It would need a volume of a different character from this one to indicate even in outline the practical measures in which they might be gradually clothed. But if the ideas are correct — an hypothesis on which the author himself must necessarily base what he writes — it would be a mistake, I predict, to dispute their potency over a period of time. At the present moment people are unusually expectant of a more fundamental diagnosis; more particularly ready to receive it; eager to try it out, if it should be even plausible. But apart from this contemporary mood, the ideas of economists and political philosophers, both when they are right and when they are wrong, are more powerful than is commonly understood. Indeed the world is ruled by little else. Practical men, who believe themselves to be quite exempt from any intellectual influences, are usually the slaves of some defunct economist. Madmen in authority, who hear voices in the air, are distilling their frenzy from some academic scribbler of a few years back. I am sure that the power of vested interests is vastly exaggerated compared with the gradual encroachment of ideas. Not, indeed, immediately, but after a certain interval; for in the field of economic and political philosophy there are not many who are influenced by new theories after they are twenty-five or thirty years of age, so that the ideas which civil servants and politicians and even agitators apply to current events are not likely to be the newest. But, soon or late, it is ideas, not vested interests, which are dangerous for good or evil. _______________________________ Credit Free Economy More Jobs, No Debt, No Fear. Prosperous, Fair and Stable. _______________________________