Corporate Profits: What the Current Level Tells Us About S&P 500 Returns Over the Next Five Years

Last week, in his weekly market comment, John Hussman posted an interesting chart (see below) comparing the corporate profit to GDP ratio and the subsequent growth rate in corporate profits. I have previously posted on profit margins (see here and here) and will now further explore what profits margins at current levels imply about the next five years for the S&P 500 index.

But first a question: why is the current level of corporate profit margins so important?

When looking at the market through a P/E (Price divided by earnings) framework it becomes obvious that any price appreciation, by definition, must come from an expansion in the P/E multiple, an increase in earnings or both. Experts disagree on what, exactly cause an expansion or contraction in the P/E multiple but the general consensus is that it is due to the level of inflation, interest rates, investor sentiment or a combination of the three.

The current S&P 500 P/E multiple based on trailing twelve months earnings is 17.88; a level that is in the top 26% percent of monthly periods since 1900. The average multiple over that period is 15.68. Looking at the Shiller PE 10 or CAPE, the current multiple of 21.75 is higher than all but 18% (242 out of 1331, nearly half of which have occurred since 1999) of monthly occurrences. The post-1900 average for the CAPE is 16.29. Using either method, the current P/E multiple is above average historical levels. Based on this, it would appear auspiciously sanguine to count on a significant expansion in the multiple to drive returns. With multiples near the upper 20% of their historical range it is important to look at potential earnings growth as a source for price appreciation.

Earnings growth can come from two sources; economic growth and an expansion in the corporate profit margin. Economic growth, as measured by GDP, while certainly volatile from year to year has, over the longer term, remained fairly consistent. The general consensus seems to be that we are in for a period of average to below average growth so it would seem imprudent to count on returns from above trend growth in GDP. That brings us back to profit margins as a key driver of returns on a broad based index, in this case the S&P 500, over the next five years.

The following chart (click on any chart for a larger view) was posted by John Hussman in his November 15th market comment; I have recreated it for use here.

As can be seen in the chart (profit to GDP on right hand scale and 5 YR CARG inverted on the left had scale), the level of corporate profit to GDP is fairly indicative of the subsequent five year growth in profits. The correlation between the two metrics is -.73, which means that as corporate profits to GDP rise the subsequent growth in profits decline. Another way to analyze the data is through a scatter plot.

The current level of corporate profits, at 8.3% of GDP, is higher than the great majority of other periods. Furthermore, when profits are greater than 7% of GDP there are no examples of five year annualized profit growth at more than 5% (the box above).

Next we examine the percent change in the corporate profit ratio. Again, the subsequent change in the ratio is negatively correlated to the current level at -.58. Over the next five years based on the historical evidence we should expect the current profit ratio of 8.3% to decline.

With the negative correlation between present profit levels and future growth firmly established we move on to examining just what the current profit levels mean for future growth. See the next two tables that breakdown both the subsequent five year compound annual growth rate (CAGR) in corporate profits and the five year change in corporate profit to GDP ratio.

Table 1 (Click to Enlarge)

Table 2 (Click to Enlarge)

Looking at these tables it is clear that the annual growth in profit is highest when beginning at low profit margin levels. Furthermore, this high growth is primarily driven by an increase in the margin not by exceptional GDP growth. This is evidenced by the average change in margin percentage in Table 2.

Notice especially the historical experience when corporate profits are greater than 7% of GDP. On average, we would expect no growth in corporate profits over the next five years with one standard deviation above average providing only 2.3% annual growth over the next five years. What’s more, the maximum five year annual growth when corporate profits were above 7% of GDP is only 4.4%. Let me restate this because it is important; from the current levels we would expect on average no growth in corporate profits over the next five years and the absolute best historical experience is 4.4% annualized growth.

The average, subsequent five year change in the corporate profit to GDP ratio when starting above 7% is -24% and the best experience was a .4% expansion. Based on history, we should expect little to no growth in corporate profits over the next half decade due to a decrease in the corporate margin. This is also based on the average growth in GDP since 1947, if we see slower growth going forward corporate profits could even do worse.

Finally, two histograms to give an idea of the five year subsequent distribution of corporate profit growth and the change in margins when starting above 7%.

As can be seen, once again, when starting with corporate profits above 7% of GDP at no point was the subsequent five year CAGR in corporate profit above 5% with the most frequent outcome being five years of zero growth. Twenty-six of the thirty-one time periods above 7% ended five years later with the profit ratio at least 10% lower than where it started.

To conclude, with the current P/E multiple well above average, GDP growth expected to either lag or merely maintain the historical average and corporate margins set for a decline we should not rely on robust price appreciation in the S&P 500 over the next half decade. Whatever, gains we do see are likely to be driven by P/E multiples rising yet further above average or growth in GDP not from an increase in corporate profit margins.

Stay tuned later this week for my next piece on what specific level this implies for the S&P 500 index five year from today.


3 responses to “Corporate Profits: What the Current Level Tells Us About S&P 500 Returns Over the Next Five Years

  1. AO December 4, 2010 at 6:18 am

    Interesting post. Thanks.

  2. Pingback: Robert Shiller’s S&P 500 Forecast for 2020: Is He Overly Optimistic? « Seeking Delta

  3. Pingback: Robert Shiller’s S&P 500 Forecast for 2020: Is He Overly Optimistic? |

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