In my mind, the easiest way to understand the over-leverage of the U.S. household is to look at the ratio of consumption to GDP. This number is essentially the amount of U.S. income devoted to consumption as opposed to investment or exports. The higher this number grows the more households have borrowed to support their consumption.
The share of income allocated to consumption in the United States has risen from 62 percent in 1980 to over 70 percent in 2008. Over 40 percent of the rise has occurred since 2000. This level of consumption is way too high. It is high by historical post-war U.S. standards and it is high by contemporary international standards.
Take a look at the inset box. Of the major industrial economies, the United Kingdom has the highest ratio. At 64 percent of GDP, however, the United Kingdom has only reached levels of consumption similar to that of the early 1980s United States.
To make a stronger link with leverage, one can glean similar insights from the current account deficit of the United States. Over exactly the same period that consumption as a share of GDP has been rising, the current account deficit of the United States has been falling. The match is close even to the point of matching the three percentage point jump since 2000. The current account deficit represents real indebtedness to foreign economies. It does not matter whether this debt is incurred because oil prices have risen or because we buy a lot of TV’s.
Assuming no growth in other components of GDP, consumption would have to fall 3.2 percent per year to bring the ratio back to its 2000 level within five years. For the ratio of consumption to GDP to fall back to its 1980’s level within five years, consumption would have to fall 7.4 percent per year. If we allow 10 years for the ratio to return to its 1980’s level, consumption only needs to fall 3.2 percent per year.
These falls are huge and well beyond anything in the modern historical record for industrial economies with the possible exception of the Great Depression. Only Argentina (and perhaps some of the Asians during the Asian Financial Crisis, though I have not checked) suffered falls of this magnitude. In 2001 and 2001, Argentina experienced repeated double-digit falls in consumption.
Of course the consumption numbers are all relative to the other components of GDP. Consumption does not have to fall as much if other parts of the NIPA accounts are growing. However, because consumption has such a large share of output, the other components would have to grow very fast indeed to keep consumption from having to fall at all. In addition, I have trouble imagining components like investment expanding when consumption is falling at these rates (see the next section).
These numbers are scary.
Implications for House Prices? By the way, the large fall in consumption has significant implications for house prices. Assuming that there is no downward adjustment in the housing stock, a back of the envelope calculation indicates that house prices have to fall 38% along this (1980) adjustment path, with the first 19% occurring in the first five years.
(Technical note: The back of the envelope calculation is derived from a Gordon-Growth decomposition, assuming log utility and constant interest rates. With log utility, the level of the interest rate does not matter. I also ignore changes in population size. This is essentially a poor man’s version of the techniques used in this Fed paper. )
Again, these numbers seem quite large. But, perhaps by coincidence, these are exactly the numbers experienced in Japan during its economic collapse in the 1990s. Between the peak in house prices in 1992 and 1997 Japanese land prices fell 19.4 percent. Between 1992 and 2002, land prices fell 37.7 percent. The numbers are not rigged or preplanned, nor are the dates carefully chosen. They just turned out exactly that way.
Another 20 to 30 percent fall in house prices from where we are now is not beyond the realm of possibility.
Implications for Other Asset Prices? MSmith’s original question was on the implications for investment. Here I am on shakier ground but the Gordon Growth model was originally intended to analyze equity prices. The same analysis should then essentially apply. Stock prices are in for a rough ride.
Let’s stick with the theme of comparing the current U.S. situation to the Japanese situation in the 1990s. Japanese equity markets peaked in 1989 and following the peak, the fell, on balance, for the next 15 years.
Below I have plotted Japanese stock prices against the Dow and indexed them both to 100 in their peak year. For the Dow, the chart starts in 1985 and runs through year end 2008. The Nikkei line starts in 1967 and also runs through year end 2008. In other words, the two time series are shifted such that their peak dates match.