OIL & INFLATION

The bond market never believed the oil war. When the Hormuz blockade sent Brent up 63% (Feb 27 – Mar 31), the 5-year inflation breakeven — the bond market's live bet on average inflation over the next five years — moved just +0.26 points, and gave it all back by June (-0.34 through the de-escalation). Today it sits at 2.37% (2026-09-01), the bottom of its 12-month range (2.16–2.72%) — even while the latest headline inflation prints run above 4%. Translated: the market says today's inflation is a level problem, not a forever problem, and that oil shocks change the headline, not the destination.

How oil actually reaches inflation

Three lanes with three speeds. Fast lane — expectations: breakevens reprice the moment oil moves; that is the chart above, and in 2026 it barely blinked. Middle lane — headline prints: pump prices carry crude into monthly CPI with a weeks-long lag; the first full month of this summer's cheap crude reaches the July 14 CPI print. Slow lane — the Fed: policy answers core inflation and expectations, not the barrel; the July 29 meeting prices that response. The mistake most commentary makes is arguing the slow lane with fast-lane headlines.

Method — where this number comes from

• The breakeven: 5-year nominal Treasury par yield minus 5-year real (TIPS) par yield, computed daily from the Treasury Department's published yield curves (~1 trading day lag). That difference is, by definition, the inflation rate at which the two bonds pay the same.
• Validation: our computed series matches the standard reference series (FRED T5YIE) to the basis point on overlapping dates — checked when we built it.
• Window moves: peak response inside the stated dates, close-to-close, from the same series shown on the chart. Correlation, not causation — the tape tells you what repriced, we tell you which lane it was in.

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