1. Why stagflation is unusual
In a normal cycle, growth and inflation move together. When demand is strong, companies hire, wages rise and prices follow. When demand weakens, unemployment rises and price pressure eases. Central banks lean against the cycle: they raise rates when the economy runs hot and cut them when it slows.
Stagflation happens when prices rise for reasons that have nothing to do with strong demand. The classic cause is a supply shock: something that suddenly makes essential goods scarcer or dearer. Higher costs push prices up and, at the same time, squeeze households' real incomes and companies' margins, so spending and hiring fall.
2. What causes it
Energy shocks
The textbook trigger. Oil feeds into transport, heating, plastics and food, so a jump in its price raises costs across the economy while acting like a tax on consumers. The 1973 oil embargo quadrupled the price of oil; the 1979 Iranian revolution more than doubled it again. See Oil and Energy Shocks.
Other supply shocks
Pandemic shutdowns, shipping disruptions, harvest failures and trade barriers can all reduce supply. In 2021–22, clogged supply chains and then Russia's invasion of Ukraine pushed up the prices of goods, energy and food at the same time.
Policy mistakes and expectations
A supply shock alone causes a one-off jump in prices. It becomes stagflation when inflation stays high. That happens when workers and companies come to expect it: workers demand higher pay to keep up, companies raise prices to cover higher wages, and a wage-price spiral sets in. In the 1970s the Fed cut rates too early several times, and expectations of high inflation became entrenched.
3. The central bank's dilemma
Stagflation leaves a central bank with no good option. Cutting rates to support jobs risks letting inflation become permanent. Raising rates to fight inflation deepens the slowdown and costs jobs. Most central banks today put controlling inflation first, on the view that entrenched inflation does more lasting damage and only gets harder to remove.
Case study: how the 1970s ended
Paul Volcker became Fed chair in August 1979, with US inflation above 11%. The Fed let short-term interest rates rise to around 20% in 1980–81. The result was two recessions and unemployment of 10.8% at the end of 1982, the highest since the 1930s. But inflation fell from 14.8% in March 1980 to about 3% by 1983, and expectations reset for a generation.
4. The 1970s and 2022 compared
- US CPI peak, 1970s
- 14.8%
- March 1980
- UK inflation peak, 1970s
- ~27%
- August 1975 (RPI)
- US CPI peak, 2022
- 9.1%
- June 2022
The 1970s were full stagflation: two oil shocks, inflation above 10% twice, recessions in 1973–75, 1980 and 1981–82, and unemployment peaking at 9% in 1975 and 10.8% in 1982. The UK fared worse, with inflation of nearly 27% in 1975.
2022 was a milder case. Inflation hit 9.1% in the US and 11.1% in the UK (October 2022), and growth slowed sharply, but US unemployment stayed below 4%. Central banks raised rates quickly, long-term inflation expectations stayed broadly anchored, and inflation fell back without a 1970s-style spiral. The UK came closer: its economy barely grew in 2023 and briefly slipped into a shallow recession at the end of the year.
5. How markets have behaved
Stagflation is hard on the traditional mix of shares and bonds, because both can fall together:
- Shares: squeezed from both sides, as profits weaken and higher rates lower valuations. The S&P 500 fell 48% in 1973–74, and over the 1970s as a whole its returns lagged inflation.
- Bonds: rising inflation and interest rates push prices down. In 2022 shares and bonds fell together, and a traditional 60/40 portfolio had one of its worst years in decades.
- Commodities and gold: have tended to do best. Gold went from $35 an ounce in 1971 to $850 in January 1980.
- Cash and short-dated bonds: held up better than long-dated ones, because their rates reset upwards quickly.
- Value over growth: companies earning cash today, such as energy producers, have held up better than those valued on distant profits.
6. Warning signs analysts watch
- Business surveys showing falling orders but rising prices paid, such as the ISM manufacturing prices index.
- Breakeven inflation and survey measures of inflation expectations moving up.
- Energy and food prices rising sharply while consumer confidence falls.
- Wage growth running well ahead of productivity while unemployment starts to rise.
None of these proves stagflation is coming. They show the conditions in which it could take hold, which is why the word appears in the daily briefing whenever an energy shock collides with already-high inflation.
Key takeaways
- 1Stagflation is weak growth plus high inflation, usually triggered by a supply shock such as an oil price spike.
- 2It traps central banks: cutting rates risks entrenching inflation, raising them deepens the slowdown.
- 3The decisive factor is inflation expectations. Once people expect high inflation to last, it becomes self-sustaining.
- 4In the 1970s and in 2022, shares and bonds fell together; commodities, gold and cash held up better.
- 5Ending it has historically required a central bank willing to accept a recession, as the Fed did under Paul Volcker.
Related
Educational content only. It describes how markets have behaved in the past and is not investment advice.