Supply Shocks vs. Demand Shocks: Why This Feels Different

You've probably noticed that inflation feels stickier this time. Gas prices are up. Grocery bills aren't exactly falling. And the usual explanation, "the Fed will raise rates and fix it," doesn't seem to be landing the way it once did. That confusion is understandable, because the type of inflation driving prices today is fundamentally different from what we experienced in 2021 and 2022. Same symptom, very different disease, and a very different path forward.

Understanding the distinction won't tell you what to do with your portfolio. But it will help you make sense of what you're hearing in the news and why even smart economists seem uncertain about what comes next.

When Too Much Money Chases Too Few Goods (2021-2022)

Think of demand-driven inflation like a crowded restaurant on a Saturday night. The food is the same. The kitchen hasn't changed. But suddenly every table is full and there's a line out the door. The restaurant raises prices because it can. That's demand inflation: more money in the system chasing the same amount of goods.

That's essentially what happened between 2021 and 2022. The federal government deployed more than $5 trillion in COVID relief (Committee for a Responsible Federal Budget), including stimulus payments, unemployment benefits, and small business support. Households that couldn't spend on travel or restaurants during lockdowns accumulated savings. Then everything reopened at once. Pent-up demand collided with supply chains that hadn't fully recovered, and prices surged.

The Federal Reserve's primary tool, raising interest rates, is well-suited to this kind of inflation. When borrowing becomes more expensive, consumers and businesses spend less. Demand cools. Prices stabilize. By 2024, that's largely what happened: major inflation measures declined from their 2022 peaks as higher rates worked through the economy (FRED: Core PCE Price Index). The Peterson Institute for International Economics (PIIE) noted that while supply shocks were an important contributor to the 2021-23 inflation episode, raising rates to cool demand was still the appropriate response.

The playbook worked because the core problem was excess demand. Remove the excess, and prices normalize.

When the Problem Is the Supply Side (2025-2026)

Now imagine a different scenario at that same restaurant. Demand is normal. But the cost of ingredients has doubled because of disruptions to the supply chain. The chef can't get certain items at all. The restaurant has no choice but to raise prices, and it might even reduce its menu or cut hours. Customers aren't spending more than usual. The supply is just more constrained and more expensive.

That's where we are today.

Brent crude oil has risen to around $100 per barrel, driven in part by conflict in the Middle East affecting Iranian supply (per CNBC, March 2026). Tariffs on Chinese imports rose roughly sevenfold between 2018 and 2020 and have remained elevated, raising input costs across a wide range of industries. As the Centre for Economic Policy Research (CEPR) has noted, tariffs on raw materials and intermediate goods function as a negative supply shock, pushing up costs for domestic producers throughout the production chain.

The economic indicators tell a mixed story. Core PCE inflation sits at 3.1% (FRED). Unemployment has risen to 4.4%, and the economy shed 92,000 jobs in February 2026 (Bureau of Labor Statistics). GDP growth was revised down to just 0.7% in Q4 2025, per the second estimate (Bureau of Economic Analysis). Prices are elevated, but growth is slowing. That combination has a name: stagflation.

Why the Fed's Toolkit Fits One Problem Better Than the Other

Here's where the policy challenge becomes real. The Fed's primary lever is the federal funds rate. Raise it, and borrowing costs increase. Consumers buy fewer cars and homes. Businesses delay expansion. Spending slows.

With demand-driven inflation, that chain of events leads to lower prices. Less demand, less pressure on prices, problem (eventually) solved.

With supply-driven inflation, the chain of events is more complicated. Raising rates still reduces demand. But it does nothing to unclog a supply chain, reverse a tariff, or bring more oil to market. You end up with lower output and still-elevated prices because the underlying cost pressure hasn't been addressed. The CEPR has observed that when global supply shocks are persistent and hard to reverse, their inflationary impact may be more difficult to simply "look through." The IMF's research on demand vs. supply decomposition similarly finds that supply-driven inflation tends to be more persistent, lasting two years or more compared to quicker reversals in demand-driven episodes.

In plain terms: the same medicine that cured the last illness can make this one worse.

The Historical Parallel: 1973 and What Followed

This isn't entirely new territory. In 1973, OPEC's oil embargo created a textbook supply shock. Energy costs spiked. Output fell. Prices rose. The Fed initially tried to accommodate the shock rather than fight it, allowing inflation to persist and eventually spiral. It took until Paul Volcker's aggressive rate hikes in the early 1980s to finally break inflation, but the cost was severe: a deep recession in 1981-1982 that pushed unemployment above 10% (FRED).

The lesson many economists took from the 1970s was: don't let inflation expectations become unanchored. But the harder lesson is that supply shocks put central banks in a genuinely difficult position. Raise rates hard enough to kill inflation and you risk crushing an already-slowing economy. Hold back and risk inflation becoming entrenched.

For more on the policy mechanics, Lumen Learning's macroeconomics module offers a clear walkthrough of how aggregate supply and demand shifts create these tradeoffs.

Why This Time Feels Especially Complicated

What makes 2025-2026 particularly tricky is that it isn't a clean supply shock. There are elements of lingering demand, cost-push pressures from tariffs, energy price surges, and some residual supply chain fragility from the pandemic era, all layered on top of each other.

As CEPR researchers have noted, tariff shocks combine elements of both demand and supply disturbances, which makes them especially hard to address with a single policy tool. And the CEPR's broader monetary policy analysis reinforces that the drivers of inflation have shifted meaningfully from the post-pandemic period, complicating the Fed's response calculus.

The Fed isn't ignoring any of this. But it is navigating a situation where its best tools are a partial fit at best. That's not a failure of policy. It's the nature of supply-driven economic disruption.

Key Takeaways

• Demand inflation vs. supply inflation are different diseases with different causes. The 2021-22 episode was primarily demand-driven (excess stimulus, pent-up spending). The 2025-26 episode is primarily supply-driven (oil, tariffs, constrained production).

• The Fed's rate tools are better suited to demand inflation. Raising rates cools spending, which reduces demand-pull price pressure. With supply-driven inflation, those same rate hikes reduce spending but don't fix the underlying supply constraints.

• Supply-driven inflation tends to be more persistent. IMF and CEPR research suggests it can linger two or more years, longer than demand-driven inflation episodes, because the fix requires supply-side solutions, not just monetary tightening.

• History offers caution, not a clean roadmap. The 1973 oil shock and the painful 1980s disinflation are instructive, but today's mix of tariffs, geopolitical disruption, and post-pandemic fragility has no perfect historical precedent.

• Uncertainty is not the same as crisis. Elevated uncertainty about inflation and growth is a normal feature of complex supply disruptions. Understanding the mechanisms helps put the noise in context.

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Sources

• CEPR: Monetary policy response to tariff shocks
• CEPR: From earth to heaven: Changing drivers of monetary policy
• CEPR: Making a supply shock: Tariff propagation through domestic production networks
• CEPR: Supply shocks and inflation: Timely insights from financial markets
• PIIE: Supply shocks were the most important source of inflation in 2021-23; raising rates was still appropriate
• IMF Working Paper: Demand vs. supply decomposition of inflation
• Lumen Learning: Policy implications: Supply shocks and economic growth
• CNBC: Fears of 1970s-style stagflation arise with oil spike to $100

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Jan Galvez is the founder of Narra Wealth Management. Narra may benefit if readers choose to engage financial advisory services. This article does not constitute a recommendation of any investment strategy.

This content is for educational purposes only and should not be considered personalized financial advice. References to academic research are illustrative and not predictive. Individual circumstances vary, and the information presented reflects general principles and current research as of the publication date. Past performance is not indicative of future results. All investments involve risk, including the potential loss of principal. Behavioral biases affect individuals differently, and self-awareness alone does not guarantee improved outcomes. Before making financial decisions, consider consulting with a qualified financial advisor who can evaluate your specific situation, goals, and risk tolerance.