Tuesday, October 14, 2008

A look at historical values on S&P 500 Earnings and Home Prices

Throughout the housing bubble, Robert Shiller's book, “Irrational Exuberance”, has served as my compass. In particular, his graph of U.S. home prices adjusted for inflation going back to 1890 was etched in my mind.



In his book, he talked about a home price index that was constructed in Amsterdam with over 300 years of data from 1628 to 1973. He writes “Real home prices did roughly double, but took nearly 350 years to do so…the annual real price increase was only 0.2%.” He released a graph , combining the Amsterdam data with data from Norway and the U.S., in a paper he published later.


Every month I update the S&P Case-Shiller Home Price Index and include what the CME Futures market is pricing in for prices in the near future. Here is a link to my most recent post on the Indexes.


Robert Shiller also had graphs of the S&P 500 going back to 1871. His website at http://www.irrationalexuberance.com/ has spreadsheets that get updated every so often. Here are two of his graphs that I updated with data through today's close.









Going back to 1881, the average P/E ratio using the trailing 10 years of real earnings has been 16.34. As of today, the current P/E ratio is 16.98. Whether or not the stock market is fairly valued right now is in great debate (as shown by the huge gyrations of the stock market in recent weeks). It really depends on what you think will happen to earnings and how severe the slowdown will become. Here is a graph showing the earnings for the S&P 500 going back 20 years.

The analysts have been caught off guard by the severity of the credit crunch. Back in April, analysts thought that 2008 Q2 earnings would be higher than the peak in 2007 Q3. Here is a graph from my April 2008 post. 2008 Q1 and Q2 earnings were substantially lower than forecasted. For the last year, analysts have constantly been surprised by earnings and have consistently overestimated earnings for the last 12 months. Last week's plunge was in part due to the fact the market was realizing that there will be a slowdown in earnings due to the credit crunch. The million dollar question is how much and how long the slowdown will be.


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2 comments:

Anonymous said...

Great charts.

Take a look at Japan's stock market. It is lower today than it was in 1984! It is also trading at 20% of its all time highs.

So much for the "truism" that stocks always go up in the long run. Same thing with houses. If it was that easy everyone would be doing it. Opps! Everyone is/was doing it, lol!

There are no guarantees when it comes to investing.

Hiroshi Hishida said...

Thanks.

Japan looms in the back of my mind whenever I think about our current situation. The Nikkei 225 hit 38,957 on the last trading day of 1989. It has been downhill from there for them.

You are right, there are no guarantees at all.