What is stagflation?

Stagflation is a period when prices keep rising while the economy is weak or barely growing. It is uncomfortable because inflation usually points to strong demand, while stagnation points to weak demand. Stagflation joins the two problems: your money buys less, businesses face higher costs, and jobs or wages may come under pressure at the same time. That leaves households, firms and policymakers with fewer clean choices than in a normal inflationary boom or a normal downturn.

How stagflation happens

A common trigger is a supply shock, which means a sudden disruption to something the economy needs to produce and move goods. Energy, food, shipping and essential raw materials can all play that role. When those inputs become harder to get or more expensive, businesses face higher costs before they have sold anything more.

Some firms pass those costs on through higher prices. Others absorb part of the hit, cut investment, reduce production or slow hiring. The same shock can therefore lift inflation and weaken growth together. People feel it in a practical way: everyday goods cost more, while incomes may not keep pace.

Demand-driven inflation works differently. If people and businesses are spending strongly, prices may rise because the economy is running hot. In stagflation, prices can rise even when demand is soft, because the pressure comes from the cost and availability of supply.

Why it challenges the Phillips curve

Stagflation is unusual because it cuts across the simple Phillips curve trade-off. The Phillips curve describes the tendency for inflation and unemployment to move in opposite directions under some conditions: stronger demand can mean higher inflation and lower unemployment, while weaker demand can mean lower inflation and higher unemployment.

Stagflation does not fit that neat pattern. A supply shock can raise prices while also damaging output and employment. The problem is not that people are spending too freely; it is that producing and distributing goods has become more expensive or constrained.

That is why stagflation changed how many economists think about inflation. It showed that inflation is not always a demand problem. Sometimes it comes from the supply side of the economy, where policy tools work less directly.

Why it is hard to fix

The difficulty is that the usual remedies pull against each other. If a central bank tightens monetary policy to slow inflation, borrowing and spending can weaken further. That may help prices over time, but it can deepen stagnation in the meantime.

If policy tries to support growth by making credit easier, demand may recover, but inflation can become harder to contain. Fiscal support can also help households or firms, but if it raises demand without easing the supply problem, price pressure may persist.

There is no clean switch that fixes stagflation at once. The path out usually depends on what caused it: whether supply constraints ease, energy or input costs stabilise, productivity improves, or policy manages to reduce inflation without causing unnecessary damage to growth.

Historical context

Stagflation became a central economic idea after major energy-related shocks showed that rising prices and weak activity could appear together. Those episodes mattered because they challenged the belief that inflation mainly came from overheated demand.

The lesson is still useful. When prices rise during a weak economy, the first question is not only “Is demand too strong?” It is also “Has the economy’s ability to supply goods and services been disrupted?” That distinction shapes how stagflation is understood, and why it remains one of the harder economic conditions to manage.