What it means
When prices and wages fall across an economy, the amount you owe stays the same in dollars but becomes worth more in real terms. A business that borrowed $100,000 when its products sold for $10 now needs to sell more units to repay the same debt, because each unit earns less.
Its debt has grown heavier even though no new borrowing has taken place. Borrowers under pressure cut costs, lay off workers and sell assets to raise cash.
These actions reduce demand and push prices lower, which makes the remaining debts even heavier. Banks, seeing more defaults, lend less, which depresses spending further and feeds the cycle.
Fisher argued that over-indebtedness followed by a wave of forced selling is a powerful cause of deep slumps. This differs from the common view that price falls are harmless because they make goods cheaper.
When the economy is heavily indebted, falling prices can be damaging rather than helpful. Central banks and governments try to prevent the spiral.
They may cut interest rates, buy assets to inject money, support banks or run budget deficits to maintain demand. Many central banks aim for low but positive inflation, partly as a cushion against the risk of falling prices.
For businesses, the concept is a reminder that borrowing in an economy where prices may fall is riskier than it looks. Companies with high debts and little cash can be forced to sell at poor prices, and property or commodity-based sectors tend to be particularly exposed.
Managers who plan using only the best-case price path can find that the same debt feels twice as heavy within a couple of years. Related situations include the property market falls seen after credit booms, where lower house prices leave owners owing more than their homes are worth.
The same loop of forced sales and falling values can then drive further declines.
In practice
Real-world examples.
Example
A farm borrowed heavily to buy land when crop prices were high. When crop prices fall by a fifth, the farm's income no longer covers the loan payments, and it is forced to sell land at a low price.
Example
Property investors in a city take out large mortgages during a boom. When values drop, many owe more than their buildings are worth, sell at a loss, and push prices down further, which in turn makes banks even more reluctant to lend.
Example
A retailer with significant bank debt sees consumer prices falling across its sector. It cuts staff and slashes orders to preserve cash, which reduces demand for its suppliers as well.
Formula
Calculation
Formula: Real debt burden = Nominal debt / Price level index (with the starting price level set to 1.00). Change in burden = (New real burden / Original debt) - 1.
Worked example: a company owes $100,000. Prices across its market fall by 10%, so the price level index drops from 1.00 to 0.90.
Real debt burden = $100,000 / 0.90 = $111,111
Change in burden = $111,111 / $100,000 - 1 = 11.1%
Even though the company has not borrowed a cent more, the debt now represents about 11.1% more in terms of goods and services than before. If the company's revenue falls by 10% too, repaying the same fixed debt takes a larger share of its income.Case study
Seen in the real world.
Greystone Holdings is a fictional property company used here as an illustrative example. It borrowed $80 million to buy office buildings when prices were rising and rents looked secure. Then a downturn arrived and office values dropped by 25%.
The lender demanded extra security, so Greystone sold two buildings quickly at low prices. Those sales were seen by other owners and valuers, who marked down their own buildings, and more lenders tightened their terms.
Greystone survived by negotiating a longer repayment schedule and selling a non-core asset in an orderly way, instead of dumping buildings into a weak market. In this illustrative story, the company's near-collapse came less from poor operations than from the combination of high debt and falling prices.
Watch out
Common mistakes.
- Thinking falling prices are always good for business. When debts are high, they can strain borrowers badly.
- Confusing debt deflation with ordinary deflation. The extra damage comes from the link between debt levels and falling prices.
- Believing it only happens in history books. Property busts and commodity collapses have produced local versions of the same pattern.
Questions
People also ask.
Who developed the idea of debt deflation?
The American economist Irving Fisher put it forward in the 1930s, after studying the Great Depression. Later economists revived it to explain slumps that followed credit booms.
How can businesses protect themselves?
Keep debt at sensible levels, hold cash reserves, spread repayment dates and avoid relying on rising asset prices to repay loans.
How do policymakers respond?
They may cut interest rates, support banks, buy assets or increase public spending. The aim is to stop falling prices and forced selling from feeding on each other.
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