The Numbers That Support The Trump Stock Rally
$SPY, $AMZN, $FB, $GOOGL, $MSFT
Pundits and talking heads are suggesting worries of a ‘Blow Off” Top to the record-high stock market because equities are overpriced.
But a close look finds that the market’s current value is not extreme.
After a series of record-breaking closes for US stocks and the prospect that lower corporate tax rates might continue to boost markets, investors had plenty to be excited about as 2017 drew to a close.
But the strong rally has also spurred growing concerns of a bubble in overpriced shares. At the time of this writing, the S&P 500 index’s 1-year-forward PER (price-earnings ratio) stood at 18.6, higher than in the majority of years over the past 50 years.
Yet it bears remembering that the headline number was misleading during the dot-com bubble in 1999.
It may be so again.
By digging deeper into what is behind that PER and putting it into a context that includes the real economy, a picture of market value begins to emerge that doesn’t seem so extreme. Executives should focus on their companies’ and industries’ value, not markets as a whole.
That said, additional perspective can help investors and strategic planners alike make better decisions.
The S&P 500 is a value-weighted index, meaning that each company’s contribution to the index is not equal, but a reflection of its individual value. While in most years unusually high- or low-value companies will cancel out any distortion to the index overall, that isn’t always the case.
In 1999, for example, a small number of mega-capitalization (megacap) stocks with very high PERs distorted the index.
Removing those companies led to a PER for the rest of the index that was well within normal bands. Something similar happened decades earlier.
In 1972, a high-market-capitalization company like Kodak traded at 37X its forward earnings and Xerox traded at 39X.
We find the same situation today.
Now 4 megacap companies, Amazon, Facebook, Alphabet, and Microsoft together valued at more than $2-T, account for 10% of the index and, as a group, trade at a PER of 29X.
Excess cash among the remainder accounts for another $1.2-T.
Note: The S&P 500’s total market capitalization at the time of this writing in December was $23.4-T.
Excess cash distorts the index because it generates very little in earnings, leading to an implied high PE multiple.
This is the case with the unusually large levels of cash held by a number of companies today. Removing the 4 companies mentioned above from the calculation and adjusting for the excess cash that companies hold as they await changes to tax laws before repatriating foreign profits reduces the current PER to 16.9 (Exhibit 1).
This is much closer to the range typical in “normal” economic times such as the mid-1960’s, the late 1980’s and early 1990’s, and the years 2003 and 2004, when the US economy was growing and inflation was under control.
It is useful to put that number into context by relating it to the real economy.
A company’s value and the market as a whole (as well as the PER) are related to its cash-flow generation and its cost of capital.
Cash-flow generation, in turn, depends on profit growth and return on capital. Using a discounted cash-flow model, we can reverse engineer the S&P 500’s PER to see what future performance would be required to justify that PER.
A 16.9X PER is consistent with a long-term profit growth rate of about 4.5%.
Subtracting about 2.0% for expected inflation leads to a long-term real profit growth of about 2.5%. Profit growth is often compared to growth in GDP. That profit growth would be slightly over the 2.3% average annual GDP growth over the past 20 years, but below the 50 year rate of 2.8.
As for GDP forecasts, some analysts believe that the United States is stuck in a slow-growth environment of less than 2.0% real growth, while others believe that potential growth is closer to 2.5 to 3.0%.
Furthermore, some industrial companies, particularly those that provide critical components to other companies, have been able to increase their profit margins.
Whether or not profit growth will keep up with GDP growth or slow is subject to debate.
Another factor to consider is how the substantial reduction in corporate taxes as part of the US tax-reform effort plays out. Lower taxes could lead to a 1-time increase in corporate profits or be eroded by competition, in which case savings would be mostly passed on to customers.
The PER is very sensitive to small changes in assumptions about future growth and the cost of equity (Exhibit 2).
For example, a 16.98X PE is equivalent to a lower cost of equity of 8.5% and a lower nominal growth rate of 3.5%, compared to the base case presented above.
Our earlier research explained that the cost of equity had not decreased with central bank policies of quantitative easing that produced unusually low interest rates.
Others have argued that low rates are here to stay for a very long time and that the cost of equity should be lower.
The margin of error in interpreting PERs is large.
In general, a half percentage point change in the cost of equity changes the PER by 2X, or about a 10% change in the index. Similarly, a half percentage point change in the projected growth rate changes the PER and value by between 5 and 10%.
For executives, it bears repeating that there is not much evidence that the cost of equity has declined significantly, despite low interest rates, so companies probably should not lower their required rates of return for investments.
Furthermore, executives should focus on the value of their company and industry, not the market as a whole. They should also not put much weight on stock-market volatility, which will always be present and should not influence business strategy.
By Ravi Gupta and Bin Jiang
Paul Ebeling, Editor
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