Stagflation (1970s)

Definition

The Great Inflation (roughly 1965-1982) is the US economy’s defining inflation-regime episode: CPI inflation climbed from ~1% to peaks near 15%, twice spiking with oil shocks (1973, 1979), while growth stagnated — the “stagflation” combination the era’s Keynesian consensus said shouldn’t persist. Equities went nowhere nominally for ~16 years (1966-1982) and lost roughly two-thirds of REAL value peak to trough; bonds suffered their worst documented sustained real losses; commodities and hard assets ruled. It is the KB’s reference regime for what a durable inflation era does to every asset class simultaneously — and 2022’s one-year preview made its lessons current again.

How it works / structure

• The regime’s anatomy (Fed History): policy that treated inflation as cost-push and tolerable, stop-go tightening abandoned at each growth scare, de-anchored expectations (the documented core — once wage/price setters EXPECTED inflation, it self-perpetuated), oil shocks amplifying an already loose regime, and the Nixon-era wage/price controls failing visibly; ended only by Volcker’s 1979-82 tightening at the cost of deep recession.
• The asset-class record (engine-relevant): equities’ nominal flatness hid the real destruction (multiples compressed from ~18 to ~7 as the discount rate repriced — fa-dcf-valuation duration arithmetic over a decade instead of 2022’s one year); long bonds lost real value persistently (“certificates of confiscation” — the documented era epithet); commodities, gold (post-1971 float), and real assets were the decade’s winners (ext-commodities); value/low-duration equities beat growth persistently (strategy-factor-investing regime dependence).
• The expectations mechanism: the era’s central lesson — inflation’s persistence is set by EXPECTATIONS regimes, not month-to-month prints; monitoring anchoring (survey and market-implied expectations vs realized — event-cpi machinery) distinguishes episodes from eras.
• The 2022 rhyme and difference: 2022 replayed the transmission (episode-rates-shock-2022) but policy responded in months, not years — expectations held anchored; the 1970s remain the un-anchored counterfactual every inflation regime is graded against.

When it applies

Inflation-regime classification (anchored vs de-anchored is THE regime variable — macro-inflation-linkages); long-horizon allocation stress (portfolios must carry a sustained-real-loss-in-both-stocks-and-bonds scenario — the 1970s is its calibration); real-asset sleeve justification; duration-tilt decisions within equities.

Risk profile & failure modes

• Nominal-return illusion (the era’s core trap): flat nominal indices masked catastrophic real losses — real-terms accounting is mandatory in inflation regimes.
• Stop-go extrapolation: each premature easing re-ignited inflation — policy-pivot theses in un-anchored regimes carry documented failure history.
• Hedge timing: commodities won the DECADE with brutal interim drawdowns — regime hedges still need drawdown budgets.
• Misuse: pattern-matching every inflation spike to the 1970s — the anchoring test separates 2022-style episodes from Great-Inflation eras; the KB requires the expectations evidence before the era analogy.

Evidence & limits

The Federal Reserve’s own historical essay documents the policy anatomy; asset-class records are public history; the expectations-anchoring mechanism is the documented consensus reading. Era-specific structures (wage indexation, oil intensity) differ today — transmission strengths are regime variables, not constants.

Falsifiable-thesis examples

Illustrations only, not signals:

• “5-year survey inflation expectations rising above 4% and staying for 4+ quarters marks a de-anchored regime in which long-bond real returns are negative (era-fingerprint thesis)” — falsified by the paired series.
• “In inflation regimes (trailing CPI >5% for a year), low-duration value equities beat long-duration growth (1970s factor replay)” — falsified by the regime-conditioned factor spread.

Cross-references

• The transmission library: macro-inflation-linkages, regime-rate-environments, event-cpi
• The modern rhyme: episode-rates-shock-2022
• The winners’ asset class: ext-commodities
• The cycle frame: macro-business-cycle