Grey Swan / Archimedes  ·  historical run  ·  v11.9

Spring 2026: deterioration from the baseline.

The Spring run recorded a measurable deterioration from October 2025. Trade fragmentation and health-surveillance degradation pushed the conditional probabilities toward Lost Control. Two system flags were active and a third risk signal was building.

Spring 2026
Run date
v11.9
Model version
October 2025
Comparison
Global
Scope
Model overview Spring 2026 Fall 2026 2050 Settlement
The probabilities worsened after the October 2025 baseline.
Trade fragmentation and health-surveillance degradation drove the movement. The Geopolitical Shock and Health Surveillance flags were active. The Wealth-Diffusion Gate remained closed. The new Economic Stress Flag had not triggered, but leading indicators were softening enough to put it on watch for the next run.
Baseline to Spring 2026
How the conditional odds moved
Choose an outcome. The chart compares the October 2025 baseline with the Spring 2026 v11.9 run under the two conditional policy postures.
Do The Right Thing
Let It Rip
2030
2040
2050

Spring 2026 conditional probabilities

The original model did not yet estimate how likely DTR or LIR were. It reported the outcomes conditional on each posture.

Do The Right Thing
Let It Rip
HorizonPostureFull empowermentManaged disruptionUneven transitionLost control
2030DTR3%18%57%22%
2030LIR0%2%22%76%
2040DTR7%10%40%43%
2040LIR0%1%7%92%
2050DTR14%6%27%53%
2050LIR0%0%1%99%

What moved the Spring run

The v11.9 reading was driven by persistent and corroborated signals, not single events.

Cumulative trade fragmentation

Tariff volatility and policy fragmentation persisted across shipping, connectivity and trade-policy evidence, weakening the coordination outlook.

Health surveillance coverage

WHO FluNet reporting coverage weakened across parts of sub-Saharan Africa and Central Asia, activating the Health Surveillance Flag.

Geopolitical risk elevated

The Caldara-Iacoviello Geopolitical Risk index remained elevated, raising the corroboration threshold for positive signals in exposed levers.

Economic stress approaching threshold

The OECD Composite Leading Indicator softened and employment evidence weakened in lower-income groups, but the new Economic Stress Flag did not yet meet its activation rule.

Compute access improved at the margin

Open-weight model proliferation broadened access, but the signal was not persistent enough to produce a positive probability movement.


System flags at Spring 2026

Flags do not create outcomes by themselves. They make positive evidence harder to credit until the underlying stress clears.

Health Surveillance: active

Coverage degradation meant positive health nudges were capped until sustained recovery.

Geopolitical Shock: active

Elevated geopolitical stress increased the persistence requirement for positive readings.

Economic Stress: inactive / watch

Leading indicators were weakening but had not met the formal trigger.

Wealth-Diffusion Gate: closed

No broad improvement was visible across household buffers, profit participation and inequality trends.


Evidence used in v11.9

This page preserves the Spring run as a historical record. The Fall 2026 v12 architecture replaces several of these proxies with more direct measures.

The Spring model used public evidence from the IMF, World Bank, UN, IEA, WHO, OECD, ILO, NOAA, M-Lab, CAIDA, RWI/ISL, UNCTAD, WTO, the Federal Reserve and major grid operators. Odds moved only after persistence and corroboration. Every accepted movement was logged and reversible.

The current model architecture is v12.0. See the Fall 2026 page for the updated measures and the new posture-likelihood layer.