Precedent · Other
Japan: Bubble & the Lost Decade
1990–2003
Japan's asset-bubble collapse and "lost decade(s)." The Nikkei fell ~80% from its 1989 peak, land prices collapsed, and the economy slid into a balance-sheet recession with entrenched deflation that monetary policy struggled to break for twenty-plus years. The canonical debt-deflation case.
The signature
Each variable's peak deviation from the pre-event baseline, with the curve shape, the lag before it moved, and how long the recovery ran.
| Variable | Peak deviation | Shape | Lag / Recovery | Confidence |
|---|---|---|---|---|
| CPI Inflation Entrenched deflation for years | −8% | L | 365d lag · 1000d | medium |
| S&P 500 Proxy for Nikkei -80% over the decade; sustained | −55% | L | 0d lag · 1000d | medium |
| Real GDP A decade-plus of stagnation | −2% | L | 180d lag · 1000d | medium |
Methodology
Equities collapsed and stayed down (an L, not a V), prices turned to outright deflation (negative CPI for years), and growth stagnated for a decade. The signature is a balance-sheet recession: over-levered firms pay down debt instead of investing even at zero rates (Richard Koo's framing), so monetary stimulus pushes on a string. Shapes: L (equities, prices, growth — sustained, no in-window recovery).
What's different now
Read for debt-deflation and the limits of monetary policy. Once deflation expectations embed, the cycle self-reinforces and rate cuts lose traction; the fix is fiscal + structural, slowly. Pairs with the Minsky and Dalio Big-Cycle schemas (the deleveraging phase made concrete).