Seven months into the oil shock, a stagflation risk hidden by the AI rally

Special Report: Seven Months Into the Oil Shock, a Stagflation Risk Hidden by the AI Rally

2026-10-09 · Macro Analysis

> ⚠️ This is a macro analysis, not a forecast, and not investment advice. Sources and the full disclaimer are at the end.

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The Fed, oil, and a risk that is not yet priced

Brent crude was at $125 on October 6, and prices have stayed high for seven months. This piece follows one chain: the Fed will put inflation ahead of employment; but this time the inflation comes from the oil supply, and rate hikes cannot fix that; so the cost lands on the economy, and in a bad case it ends in mild stagflation. Financial markets are broadly optimistic and have not priced this chain. Meanwhile there is no sign that the oil supply problem will be solved soon.

The piece takes six steps: why the Fed will prioritise inflation; why rate hikes cannot cure this inflation; how the cost reaches the economy step by step, and how far we are from stagflation; why markets have not priced it; why the supply problem shows no sign of a quick fix; and how to manage the investment risk. Over the past two years this risk has been covered up by the AI rally, and it barely shows in the US stock indexes.

1. The Fed will put inflation ahead of employment

The Fed has two mandates: stable prices and maximum employment. When they conflict, the past five years show it protects prices first. In 2021 the Fed called inflation "transitory" and did not tighten in time; inflation went on to its highest level in decades. In 2022 it had to lift the policy rate from near zero to above 4% within a year, and Chair Powell said publicly that August that bringing inflation down would bring some pain to households and businesses. After that lesson, it is less willing this time to "look through" a lasting inflation shock.

Current signals point the same way. September payrolls rose by only 29,000 and hiring has clearly weakened, yet New York Fed President Williams is talking about another hike in December. The 10-year real rate is already 2.87%, up from 1.78% a year ago. Employment is weakening while the Fed still talks about hiking: in its eyes, inflation ranks higher.

2. Rate hikes cannot cure this inflation

This inflation starts on the supply side: the strait, the Red Sea, tankers, Russian refineries. Interest rates can repair none of them. What the Fed can do is raise rates to push demand down.

The trouble is that gasoline and diesel are necessities for daily life and for production: people drive to work, and goods move by truck. Research puts the numbers very low. For 2001–2006, the short-run price elasticity of US gasoline demand was only −0.03 to −0.08: if the oil price doubles, short-run use falls by only 3% to 8%. A meta-analysis of many studies, corrected for publication bias, puts the average short-run elasticity at about −0.09. Demand today is also less responsive than in the 1970s, when the same figure for 1975–1980 was −0.21 to −0.34. Current prices bear this out: US retail gasoline rose from $3.12 to $4.35 a gallon over a year, and diesel from $3.71 to $6.20, yet drivers and trucking firms can hardly use much less.

So to make oil use fall noticeably, incomes have to fall, which means a weaker economy and job losses. The chain is long: higher rates → slower investment and spending → layoffs → lower incomes → less oil use → lower oil prices. Jobs pay first and the oil price moves last. And because the shortage comes from supply, pushing demand down somewhat may not bring the price back to where it was. The US in 1979–1980 went through exactly this: two oil shocks in a row, the Fed pushed rates very high, inflation was finally brought down, and the price was the deep recession of 1981–1982.

3. The cost falls on the economy: step by step toward mild stagflation

Suppose the supply problem is not solved soon, and Brent stays above $120 from now until next spring. In time order, the effects spread in three stages, each pushing the next.

Stage one, October to December this year: energy pushes headline inflation back above 4%. This stage is close to arithmetic. A year ago Brent was $63–67; now it is $125, so the year-on-year rise in energy prices will be large. The spring wave already showed how this works: in May headline CPI jumped to 4.27%, airfares were up 23.95% from a year earlier and motor fuel 40.46%. By August airfares were still up 28.91% and motor fuel 27.41%. If oil stays high, headline CPI will very likely be back above 4% over the winter months. Core inflation is still holding in this stage: August core CPI was 2.76% and core PCE 3.01%, so the Fed can still call this a temporary energy shock.

Stage two, January to March next year: price rises seep into core inflation. Once energy costs have stayed high for more than six months, companies build them into prices. Diesel is up 67% in a year, feeding straight into trucking rates, food and delivery costs; jet fuel has doubled, feeding into airfares; plastics and chemicals follow crude. The start of the year is when many companies reset prices. The Wall Street Journal reported in late September that soaring transport costs are spreading through the US economy. Household inflation expectations are already high: in the University of Michigan survey, households expect 4.0% inflation over the next year, and the figure reached 4.8% in May, so companies meet less resistance when they raise prices. At this point core PCE would move from 3.0% toward 3.3%–3.5%, and inflation turns from an oil problem into a problem across all prices.

Stage three, next spring: central bank tightening and slower growth arrive together. Once core inflation rises, given the priority described in Part 1, the Fed will choose to keep tightening; and by the logic of Part 2, tightening pushes jobs down while the oil price may not come down. In this scenario real rates are hard to bring lower. Consumers are squeezed three ways: average hourly earnings are up only 3.02% year on year, below inflation, so real wages are shrinking; higher oil prices act like a tax on consumers; and the 30-year mortgage rate is 7.4%. With costs rising and demand slowing, companies first stop hiring, then start laying people off. Hiring is already slowing: September payrolls added only 29,000, the three-month average is about 50,000, against 148,000 in April. Unemployment is 4.2% and initial jobless claims 197,000, with no wave of layoffs yet. Going from a hiring freeze to layoffs usually takes a few months. The unemployment rate then starts to rise.

How far are we from mild stagflation?

Mild stagflation here means three things holding at once: headline inflation above 4%, core PCE, the measure the Fed watches most, above 3.2%, and unemployment rising from today's 4.2% toward 4.7%. It does not require a real recession; 2022 was this kind of situation. Checking the scenario above against each condition:

If oil stays high until next spring, the three conditions are met one after another and mild stagflation is essentially in place. Current data are still in stage one, and neither core inflation nor jobs have worsened. That only shows the shock has not spread yet; it does not show it will not spread. Stage two needs energy costs to stay high for several months, and the market is betting precisely that it will not have time to appear. On inflation we are already close to the thresholds; the real gap is in employment, and how jobs evolve depends on how long oil stays high: the longer it lasts, the more likely companies move from a hiring freeze to layoffs.

This path would be cut short in two cases. One is an earlier fall in oil prices: traffic through the strait is recovering, OPEC+ has spare capacity, and US shale takes roughly six to nine months to turn higher prices into more output, a window we are entering now. The other is demand collapsing first: in 2008 oil hit $147 and was ultimately brought down by a demand collapse and the financial crisis, an outcome that is a hard landing.

Compared with the 1970s, this path stops at mild stagflation and is still far from a decade of severe stagflation. Back then the central bank was reluctant to tighten, inflation expectations came unanchored, and wages were automatically indexed to prices; all three are weaker today, and wage growth running below inflation is the evidence. Today's weak link is fiscal: government debt is far above 1970s levels, and the 30-year Treasury yield has reached 5.60%. If the Fed turns to easing under fiscal or political pressure before inflation is under control, mild stagflation could last longer.

4. Markets have not priced this chain

First, what the market is betting on. In the three weeks from September 8 to 29, speculative net long positions in WTI crude futures fell by nearly 30%, so money betting on higher oil is pulling back. The 10-year breakeven inflation rate is 2.33%, almost the same as a year ago, so the bond market does not expect inflation to spread. On Polymarket, "US recession by the end of 2026" trades at only 6.5%. And US stock indexes are still up 13.8% over six months. Taken together, these prices say one thing: oil will fall back soon and the shock will stay in energy.

The US can indeed absorb high oil prices better than other regions. It is a net oil exporter, Brent trades nearly $30 above US WTI, and the shock falls mainly on regions that depend on seaborne imports; the Turkey equity ETF is down 17.9% over six months. But being able to absorb the shock is different from the shock passing quickly.

Together these prices rest on a strong assumption: the oil shock will pass within a few months, inflation will not spread, and the Fed will not need to sacrifice jobs for it. If the assumption holds, the good outcome is already mostly in prices and the remaining upside is limited. If it fails, the Fed will choose inflation over jobs, and the economy and asset prices will pay a much larger cost. That is the asymmetry in the market's optimistic pricing.

5. No sign the oil supply problem will be solved soon

Since March, monthly average Brent has jumped from $63–67 before the shock to $103, risen to $117 in April, eased to about $85 in June and July, gone back to $114 in September, and reached $125 in early October. In seven months it has fallen back only once, never returned to pre-shock levels, and the second wave's peak is above the first.

What keeps oil high is several supply constraints binding at the same time. After the US–Iran war began, the Strait of Hormuz was at one point largely closed, and trade volume at Dubai's Jebel Ali port fell 90%. Traffic is recovering (ship-tracking firm Kpler puts it at 14.19 million barrels a day, against 17.13 million before the war), but attacks on ships have not stopped, Iran insists it will not open the strait until seven conditions are met, and the phased reopening plan Reuters reported in September has gone nowhere. To bypass the strait, Saudi Arabia pipes crude to the Red Sea for export, but the Red Sea is also threatened by the Houthis, so Saudi Aramco has had to send tankers back through Hormuz; the Houthis are also striking Saudi territory, damaging two airports in southern Saudi Arabia on October 7. Even once the crude is out, Vitol, the world's largest independent oil trader, warns that there are not enough tankers and that this bottleneck could push oil to $200. Add Ukraine's continuing strikes on Russian refineries and the shadow fleet, and refined products are tighter than crude: US retail diesel is up 67% in a year and jet fuel has doubled.

With these constraints stacked together, any relief in one place can be offset by another. The 1979 oil crisis dragged on the same way: the output lost to the Iranian revolution had not yet been absorbed when the Iran–Iraq war in 1980 brought a second shock. Today no party can give a timetable for oil prices to come down. The market's bet that this "passes quickly" has no matching facts behind it.

6. How to reduce investment risk

First, see where the risk is hidden. US indexes show no strain: the S&P 500 (SPY) is up 13.8% over six months. Broken down, almost all of the gain comes from AI:

Our September 25 special report calculated that the top ten S&P 500 constituents make up 38.81% of the index, and the companies funding and receiving AI build-out spending together make up 34.06%. Rate-sensitive assets, long bonds, real estate, utilities and small caps, have all fallen or lagged over these six months; the AI gains simply covered them up.

What is hidden is not only the losses but also the structure of the portfolio. Over the past 60 trading days the correlation between SPY and long-term Treasuries (TLT) has been +0.42: stocks and bonds are rising and falling together, as they did before the 2022 stock-and-bond sell-off, so the premise that "bonds cushion stocks when stocks fall" no longer holds. Inflation-protected Treasuries and gold, the usual inflation hedges, also fell as the real rate rose from 1.95% in early April to 2.87%. AI stocks are not immune to rates either: most of the value of highly valued growth stocks comes from distant cash flows, which makes them the most sensitive to discount rates, and our September 25 report noted that AI build-out increasingly relies on borrowing. Credit markets are showing early signals: high-yield spreads widened from 2.71% to 3.15% in a month, while investment-grade spreads are still at 0.82%.

Once mild stagflation takes shape, these risks surface at the same time: inflation keeps pushing rates higher, which hits not only long bonds and real estate but also the heaviest-weighted part of the index.

Next, what can be done. The following is general risk-management thinking. It is not tailored to anyone's financial situation and is not a recommendation to buy or sell.

Work out the cost if both sides fall together. Assume stocks fall 20% and long-term bonds fall 10% at the same time, run it through your current holdings, and see how much the portfolio would lose and whether you could bear it. 2022 saw a stock-and-bond sell-off close to this size. That number says more about the risk than any oil price forecast.

Group holdings by rate sensitivity. Long bonds, REITs, utilities and highly valued growth stocks fall together when real rates rise; together they are the portfolio's real rate exposure. In an S&P 500 index fund, more than a third of the weight sits on the AI trade; add technology theme funds on top and concentration may be much higher than expected. Setting a range for the concentrated part and rebalancing by rule when it is exceeded is less error-prone than chasing rallies or panic selling on instinct.

Leave room so you are never forced to sell. Money you know you will need in the next year or two belongs somewhere short-term and low-volatility. Short-term Treasuries (SHY) fell only 1.5% over these six months, while long bonds fell 10.2%. In both stagflation and a hard landing, the biggest losses often come from being forced to sell at the bottom. The same applies outside the account: floating-rate mortgages and consumer loans, and everyday spending that moves with oil prices, all add pressure in stagflation.

Know the weak spots of each inflation hedge. Energy assets follow oil but are volatile; among inflation-protected bonds, shorter maturities are less sensitive to real rates; commodity futures products carry roll costs, and leveraged products decay when held long term. Also avoid using leverage or short-dated options to bet on the direction of oil; prices could swing violently between the two outcomes.

Watch the signposts along the path. These numbers can show early which stage of the Part 3 path we have reached:

Three limits of this piece

First, the scenario is a judgement based on historical experience. The projection of what happens if oil stays high for several more months rests on historical experience and public data; ETF Radar's quantitative system has not assigned probabilities to these scenarios.

Second, price changes are price only. Six-month ETF changes use closing prices and exclude distributions; actual returns on bond and high-dividend ETFs would be somewhat better.

Third, war information comes from news reports, and elasticity figures from academic research. Strait traffic, attacks and the state of negotiations come from reporting by Reuters, The Wall Street Journal, the Financial Times, CSIS and Securities Times; some claims come from one side of the conflict and may be biased, and the situation can change quickly. Gasoline demand elasticities are estimates for past periods, and today's values may differ.

Summary

The Fed will put inflation ahead of employment, and the "transitory" lesson of 2021 makes it less willing to look through this time. But this inflation comes from the oil supply. Gasoline demand barely responds to price: if oil doubles, short-run use falls by only a few percent. Rate hikes can cut oil use only by cutting incomes, so jobs pay first while the oil price may not fall.

If the supply problem lasts until next spring, the effects spread in three stages: this winter, energy pushes headline inflation back above 4%; early next year, freight, food and airfare increases lift core inflation toward 3.3%–3.5%; by next spring, the Fed keeps tightening, real wages shrink, and a hiring freeze turns into layoffs. The three conditions are met one after another and mild stagflation is essentially in place.

Financial markets are broadly optimistic, betting that the shock passes quickly, and have not priced this chain. Yet the supply constraints at Hormuz, in the Red Sea and Saudi Arabia, in tanker capacity and in Russia are stacked together, and none shows a sign of being solved soon.

For investors, the risk has been covered up by the AI rally: index gains are concentrated in a few stocks, rate-sensitive assets are falling, and bonds no longer hedge stocks. Work out what the portfolio does if both sides fall together, look at holdings by rate sensitivity, keep room so you are never forced to sell, and watch the signposts along the path.

All of these signposts are still inside their warning levels; the path is still in stage one.

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Data through 2026-10-08. Oil and refined product prices, CPI and PCE components, average hourly earnings, household inflation expectations, employment, interest rates, real rates, breakeven inflation, credit spreads and mortgage rates are from the Federal Reserve Bank of St. Louis FRED database: DCOILBRENTEU, DCOILWTICO, GASDESW, DJFUELUSGULF, CPIAUCSL, CPILFESL, PCEPILFE, CUSR0000SETG01, CUSR0000SETB01, CES0500000003, MICH, PAYEMS, UNRATE, ICSA, DGS30, DFII10, T10YIE, BAMLH0A0HYM2, BAMLC0A0CM, MORTGAGE30US. ETF changes use closing prices stored in ETF Radar (through 2026-10-08, excluding distributions). Crude oil speculative net positions are from the US Commodity Futures Trading Commission Commitments of Traders report; the recession probability is from Polymarket. Gasoline demand price elasticities are from Hughes, Knittel and Sperling (2008, The Energy Journal 29(1), NBER Working Paper 12530) and Havránek, Iršová and Janda (2012, Energy Economics 34(1)). The size of the Fed's 2022 hikes and Powell's August 2022 Jackson Hole speech are public record. War and shipping information is from Reuters (September 24), The Wall Street Journal (September 22, September 28, October 2, October 7, and its DP World reporting), the Financial Times (October 8), CSIS (September 23) and Securities Times (October 5).

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Disclaimer

This piece was produced and assembled by an automated research system. It is general information and educational discussion only. It is not investment advice and not a recommendation to buy or sell any security or commodity, and it has not been tailored to anyone's financial situation, investment objectives or risk tolerance.

All figures come from public sources (the FRED database, regulatory positioning reports, news reports, fund prices and so on) and may contain collection, parsing or definitional errors; past data does not indicate future performance. The scenario analysis in this piece is a judgement based on historical experience, not a forecast.

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