Robert Shiller’s CAPE index refined

At the outset it must be said that, regardless of the day to day fluctuations of financial news, we are entering into unprecedented territory. What may be construed as long term planning may well be categorically different than medium term common sense.

The increases in the total federal debt outstanding are off of all known scales that we have a historical measure to compare against. In essence, the catastrophic toxic products that nearly imploded out financial system haven’t exactly vanished, as the chart below will make clear. As in a very large shell game, much of this highly problematic material has been shifted off of private books and on to public books.

One of five possibilities will ensure, or some politically expedient combination of the five.

1.    default on the debt (very low probability)
2.    debase the currency (high probability)
3.    massively curtail public spending (one can only cut so far)
4.    raise taxes (count on this one)
5.    experience such massive technological change that we can innovate our way past it

Chances are excellent that our political class will engineer a mixture of currency debasement/inflation, spending cuts, tax increases, and pray for a technological breakthrough. In other words, as for long term prospects, even if we do have a respectable recovery from the lows, as the folks at the Bank Credit Analyst are predicting, we will remain burdened with exceptional social, fiscal, and taxation problems, riding on top of demographic changes, that cannot be waved away with any known magic wand.

E-Commerce sales remain a relatively small component of the entire US economy, however we feel that they are a worthy leading indicator on one hand, and also a sign of the ways in which the consumer is moving away from the higher overhead brick-and-mortar economy to the more customized, flexible, and more deflationary economy of mobile capital and business structures.

Fascinatingly, real retail and food service sales are only about four times bigger that e-commerce sales at this point, and real storefront sales are quickly being overtaken by internet commerce. The difference obviously remains sufficiently great that one will not displace the other overnight. Having said that, e-commerce has advanced with remarkable alacrity, and the implications cannot be ignored. Soon the competitive dynamic of algorithmic pricing will displace and undercut a significant amount of that traditionally associated with face to face commerce. And that impact is likely to be disinflationary if not deflationary.

The employment cost indices make instructive viewing. Whether we look at the manufacturing, service, or private industry indices YoY, we see punishing deceleration in wage and salary gains, in line with earnings fall-offs through 2009. The great question that faces us on many levels is whether an inflationary surge that might well appear as a result of unsustainable debt will be, or could be, an effective index for private sector wage gains and sustainable retail price gains.

In the inventory to sales ratio we see a similar process of “inventory deleveraging” which is by no means merely a product of the last downturn; this is a structural change that clearly demonstrates the US economy moving closer to a just-in-time, lean run model. The move toward e-commerce suggests that this structural change will also reduce many job descriptions as the relationship between the consumer (don’t forget, this mythical being, in toto, accounts for about 70% of the US economy) and the seller removes one or more traditional layers of distribution and marketing.

So where does the estimable Robert Shiller and his cyclically adjusted price/earnings ratio fit into this picture? We tend to see the CAPE index, as it is sometimes known, as a kind of long term fair value estimator. Shiller ingeniously has taken the average of the previous 10 years of earnings as the denominator (hence the “cyclical” part) and compares his adjusted price to this long term measure of earnings capacity, instead of simply a quarter by quarter comparison of price to earnings.

We have made a minor, but we feel useful adjustment to Dr. Shiller’s calculation by instead computing the rolling ten year median earnings value and then drawing a line one standard deviation above the mean of the CAPE series and another line one standard deviation below the mean. We feel that this is a good estimate of the long term fair value band, or we might say, the not-emotionally-driven-by-panic-or-euphoria band.

Shiller median with deviations

We have also included this second chart which shows the long term average on the CAPE value from 1881 to present.

Shiller median w/ average

Our conclusion is this: at the moment the US equity markets are reasonably priced against long term trends and there could be an extended period where they perform acceptably. However, they are by no means historically cheap; one could say they are about fairly priced, and the market will be very sensitive to perceived inflation in the unfolding of the story.

As long as inflation remains tamed by disinflationary pressures, money will remain parked in the debt markets, and equities will be vulnerable to blips of bad news. There are no absolute guarantees, however, we do accept that there are vast amounts of capital forced to find a home should the economic landscape suddenly change.

As a final thought, we include this study of trends in federal debt maturities.

One can only rationally conclude that the disinflationary and pro-inflationary crosswinds will sooner or later interact with violent energy. Either large sectors of the US working population will find themselves trapped by an inflation that damages them as a social class, potentially producing an extreme and irrational political response, or there may be some novel form of social irresponsibility as the American governing class tries to finesse its way out of an impossible position.

Tags: CAPE index, disinflation, e-commerce retail sales, employment cost index, federal debt maturities, gross federal debt, inflation, inventory to sales ratio, real retail sales, Robert Shiller

This entry was posted on March 9, 2010 at March 9, 2010 and is filed under Economy, Featured, Investment, News, Trading. You can follow any responses to this entry through the RSS 2.0 feed.