The limits of debt
Since
2008 debts have been piling up faster than ever. Total world debt has
been estimated at $247 trillion, which is more than three times the
world’s product and up 11% from last year (1). Central and regional
administrations, cities, towns and villages, big and small
businesses, households and students have been borrowing as though
there were no tomorrows. This is in line with financial and corporate
profits, and has inflated the prices of real estate, stocks and
bonds. The question being, how far can this borrowing spree go? It
seems obvious that at some stage the boom will go bust. But even a
slowdown has an effect on sales and profits, and that would be enough
to deflate the bubbles and bring down the banking-credit
construction.
Buy
now and pay later means an increase in spending, followed by small
reductions over a period of time. That is interest for debts
repayable at term, and interest plus fractions of the loan in other
cases. This works quite well when incomes are growing, as the slack
in spending caused by the debt’s repayment is compensated by more
income. However, when incomes are stagnant, as they have been for
most employees in the developed world over the last two or three
decades (2), then the slack in spending lasts as long as the debt’s
repayment. This means that the boost in spending due to a new debt is
cancelled by the slack in spending of previous borrowers. Supposing a
debt of $100 at 8% interest is paid back in twelve $9 instalments. In
this case, the reduced spending of eleven past borrowers who are
paying back ($99), just about cancels the increased spending by a new
borrower ($100). At some point the accumulated paying back of past
debts and interest equals the value of new debts (3). That is when
growth in spending stops.
Governments
seldom pay back their debts, as they are systematically renewed. But
they are obliged to pay interest. A government, whose debt equals its
national GDP, must increase that debt by the same percentage of GDP
as the percentage of interest it is paying, without spending a penny
more. With world debt at three times world product, just paying
interest represents three times the going rate (say 3%) as a
percentage of world product (9%). For the past few years, rates of
interest have been kept artificially low by central bank
interventions on the market, in the US, the EU, Japan and China. This
situation seems to be ending, as interest rates are rising again.
That means that future debts will be more expensive, but it also
means that existing debts will be devalued. Debt bought at 2%
interest can only be sold at two thirds of its original value, if
interest rises to 3%. When rates rise, the face value of a debt can
only be obtained at its term. Pushing down interest rates encouraged
borrowing and sustained demand for goods and services. Now that they
are rising, demand will slow down, and debt holders will lose money,
two sure paths to recession. So central banks will buy up more debt
to keep rates low, and there will be more borrowing. Or maybe that
cannot work a second time, in which case there is financial
disruption ahead.
2.
If more people are employed, even with miserable wages, spending goes
up, as do borrowing and profits.
3.
In the case of treasury and corporate bonds, it is their renewal at
term that requires a lot of new borrowing. These borrowing cycles
could explain the periodic ups and downs of business cycles.