Email | Print    Type Size  -  +

Buffett's metric says it's time to buy

According to investing guru Warren Buffett, U.S. stocks are a logical investment when their total market value equals 70% to 80% of Gross National Product.

buffet chart
By Carol J. Loomis and Doris Burke
February 4, 2009: 9:49 AM ET

(Fortune Magazine) -- Is it time to buy U.S. stocks?

According to both this 85-year chart and famed investor Warren Buffett, it just might be. The point of the chart is that there should be a rational relationship between the total market value of U.S. stocks and the output of the U.S. economy - its GNP.

Fortune first ran a version of this chart in late 2001 (see "Warren Buffett on the stock market"). Stocks had by that time retreated sharply from the manic levels of the Internet bubble. But they were still very high, with stock values at 133% of GNP. That level certainly did not suggest to Buffett that it was time to buy stocks.

But he visualized a moment when purchases might make sense, saying, "If the percentage relationship falls to the 70% to 80% area, buying stocks is likely to work very well for you."

Well, that's where stocks were in late January, when the ratio was 75%. Nothing about that reversion to sanity surprises Buffett, who told Fortune that the shift in the ratio reminds him of investor Ben Graham's statement about the stock market: "In the short run it's a voting machine, but in the long run it's a weighing machine."

Not just liking the chart's message in theory, Buffett also put himself on record in an Oct. 17 New York Times op-ed piece, saying that he was personally buying U.S. stocks after a long period of owning nothing (outside of Berkshire Hathaway (BRKB) stock) but U.S. government bonds.

He said that if prices kept falling, he expected to soon have 100% of his net worth in U.S. equities. Prices did keep falling - the Dow Jones industrials have dropped by about 10% since Oct. 17 - so presumably Buffett kept buying. Alas for all curious investors, he isn't saying what he bought.  To top of page


Company Price Change % Change
General Electric Co 7.65 -0.19 -2.42%
Advanced Micro Devic... 19.21 0.10 0.52%
Bank of America Corp... 27.38 -0.37 -1.33%
Apple Inc 176.98 -8.88 -4.78%
Microsoft Corp 101.71 -2.91 -2.78%
Data as of 4:03pm ET
Index Last Change % Change
Dow 24,465.64 -551.80 -2.21%
Nasdaq 6,908.82 -119.65 -1.70%
S&P 500 2,641.89 -48.84 -1.82%
Treasuries 3.05 -0.01 -0.29%
Data as of 10:26pm ET
More Galleries
10 of the most luxurious airline amenity kits When it comes to in-flight pampering, the amenity kits offered by these 10 airlines are the ultimate in luxury More
7 startups that want to improve your mental health From a text therapy platform to apps that push you reminders to breathe, these self-care startups offer help on a daily basis or in times of need. More
5 radical technologies that will change how you get to work From Uber's flying cars to the Hyperloop, these are some of the neatest transportation concepts in the works today. More
Sponsors