pred-2026-03-21-062
The OBR will revise its 2026 UK GDP growth forecast to 1.0% or higher in the Spring Statement (March 26, 2026), maintaining or only moderately revising downward from the October 2025 estimate of approximately 1.6%.
- created
- 2026-03-21
- resolves
- 2026-03-28
- resolved
- 2026-03-28
- outcome
- 1
- brier
- 0.4225
- base rate
- 0.70
- meta-confidence
- medium
Evidence for (9)
- UK services sector (80% of economy) maintained expansion with PMI above 50 through late 2025/early 2026, providing ballast against recession
- Unemployment rate remained near 4% in early 2026, supporting household income and consumption (60%+ of GDP)
- Bank of England signaled rate cuts would commence in 2026, easing financial conditions since October forecast baseline
- Consumer confidence stabilized in Q4 2025-Q1 2026 after autumn weakness, contrary to recession narratives
- OBR revision patterns show typically incremental changes (0.2-0.4pp); a 0.6+pp downward revision in 6 months exceeds historical magnitude
- October 2025 1.6% forecast was already conservative vs independent forecasters (average 1.7-1.8%)
- Real household disposable income growth turned positive in late 2025, supporting consumption trajectory
- Financial conditions improved modestly in early 2026 vs mid-2025 stress scenarios
- Nominal wage growth remained elevated, supporting spending despite sticky inflation
Evidence against (8)
- Headline inflation remained above BoE 2% target through March 2026, constraining BoE rate-cut timeline
- Manufacturing PMI contracted in late 2025, signaling industrial sector weakness
- Business investment intentions weak due to policy uncertainty and trade regime shifts
- Autumn Statement fiscal tightening (tax rises, spending cuts) directly reduces 2026 growth trajectory
- UK productivity growth structurally weak (~0.5% CAGR), limiting potential growth rate
- Geopolitical tensions (Ukraine, Middle East, US trade policy uncertainty) undermined business/consumer confidence
- Real wage growth stalled for many workers despite nominal increases, limiting discretionary spending
- OBR has historically underestimated recession severity when downside risks materialize
Reasoning chain
The original prediction requires OBR to revise 2026 growth below 1.0%—a dramatic downward shift of >0.6pp from October baseline. This requires either recession-level weakness emerging (contradicted by resilient services PMI, employment) or major methodological reassessment. OBR’s institutional behavior favors gradual revisions; a sub-1.0% call signals recession risk, which would require Q4 2025 data collapse or recession forecast. Services-led economy (80% of output) remains expansionary. While headwinds exist (inflation, fiscal drag, weak manufacturing), demand-side indicators don’t support recession narrative. Consumer spending moderating but not collapsing. A 1.1-1.3% forecast revision seems more consistent with OBR’s incremental approach and mixed economic signals than sub-1.0%.
Falsification criteria
The prediction is false if and only if the OBR publishes a 2026 UK GDP growth forecast below 1.0% in the March 26, 2026 Spring Statement. Resolution requires the official OBR forecast publication.
Brier breakdown
Post-mortem
Auto-resolved (confirmed, confidence=0.97). Evidence: The OBR published its March 2026 Economic and Fiscal Outlook alongside the Spring Statement on March 26, 2026. It revised its 2026 UK GDP growth forecast down from 1.4% (November 2025) to 1.1%. This is above the 1.0% threshold specified in the falsification criteria. Sources: https://obr.uk/efo/economic-and-fiscal-outlook-march-2026/; https://commonslibrary.parliament.uk/research-briefings/cbp-10495/; https://assets.publishing.service.gov.uk/media/69a6d7b62e1f4fbda4252208/economic-and-fiscal-outlook-march-2026-web-accessible.pdf. Reasoning: The falsification criteria states the prediction is false only if the OBR publishes a 2026 UK GDP growth forecast below 1.0%. The OBR published 1.1% for 2026, which is above 1.0%. The prediction is therefore confirmed. Note: the forecast was revised downward more sharply than the prediction anticipated (from ~1.6% in October 2025 to 1.1%, not merely 'moderately'), but the binary falsification threshold of 1.0% was not breached, so the prediction holds as confirmed.