AgenticUnited Kingdom Inflation Rate YoY
United Kingdom · Monthly series · EC-GB-IRYY
Latest, September 2026
3.5%
+0.40pp from August 2026
Forecast
Forecast for September 2027: 3.6%, with an 80% interval of 0.2% to 7.9%.
| Period | Forecast | 80% low | 80% high |
|---|---|---|---|
| October 2026 | 3.6% | 3.2% | 3.9% |
| November 2026 | 3.6% | 3.0% | 4.2% |
| December 2026 | 3.6% | 2.6% | 4.7% |
| January 2027 | 3.6% | 2.0% | 5.4% |
| February 2027 | 3.6% | 2.2% | 5.3% |
| March 2027 | 3.6% | 2.2% | 5.3% |
| April 2027 | 3.6% | 1.3% | 6.3% |
| May 2027 | 3.6% | 0.9% | 6.8% |
| June 2027 | 3.7% | 0.7% | 7.2% |
| July 2027 | 3.7% | 1.0% | 6.9% |
| August 2027 | 3.7% | 0.3% | 7.7% |
| September 2027 | 3.6% | 0.2% | 7.9% |
AI confidence
Mixed evidenceThe tests show no consistent, material advantage over the no-change baseline.
Model: Agentic Investor TSFM (foundation model)
- Accuracy vs naive
- -1%Matches the no-change baseline over 12 tests (12 tests, 4 won)
- Direction
- 42%No clear edge over a coin flip (57 of 136 calls right in 12 tests)
- Turning points
- 26 of 49Anticipated most turns (49 turns in 12 tests, 0 without a turn)
- Error vs baseline
- 1% higherError ratio 1.01; 1.00 is a tie.
- Tests won
- 4 / 12Complete rolling backtests; ties count as no win.
- Test period
- 2014-10-01 to 2026-09-0112 observations ahead per test.
- 80% band coverage
- 80%Observed outcomes inside the band across all stored test windows.
- Band coverage uses all stored test windows, including model-selection windows when present; it does not determine the confidence label.
- Evaluated 2026-11-14 against the cached history through 2026-09-01.
- This is an evaluation of the serving model; it does not establish a winner across four model classes.
How this assessment is made
AI confidence describes historical evidence for this forecast, not a probability of being correct. Each backtest fits on data available before its test window. The baseline carries the last value forward. Supported evidence requires at least six complete, non-overlapping tests, an error ratio below 0.90 (rounded to two decimals), and wins in a majority of tests. Ratios from 0.90 to below 1.10 are on par; 1.10 or above is weak evidence. Inconsistent wins produce mixed evidence. For a selected model, only the recent tests excluded from model selection determine this label. These are historical simulations using the available data, not a live trading track record; revisions and foundation-model pretraining can limit how closely they reproduce a past decision. Past performance can change.
Model comparison
Comparison pendingA new ticker first receives its serving model's forecast and evaluation. An eligible nightly batch can compare four classes, subject to call budgets and retry limits.
Reading
It is above 71% of the 119 earlier readings since October 2016.
Recent history (24 observations)
| Period | Value |
|---|---|
| September 2026 | 3.5% |
| August 2026 | 3.1% |
| July 2026 | 2.9% |
| June 2026 | 2.6% |
| May 2026 | 2.8% |
| April 2026 | 2.8% |
| March 2026 | 3.3% |
| February 2026 | 3.0% |
| January 2026 | 3.0% |
| December 2025 | 3.4% |
| November 2025 | 3.2% |
| October 2025 | 3.6% |
| September 2025 | 3.8% |
| August 2025 | 3.8% |
| July 2025 | 3.8% |
| June 2025 | 3.6% |
| May 2025 | 3.4% |
| April 2025 | 3.5% |
| March 2025 | 2.6% |
| February 2025 | 2.8% |
| January 2025 | 3.0% |
| December 2024 | 2.5% |
| November 2024 | 2.6% |
| October 2024 | 2.3% |
Source
Data: public market data feeds.
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