1HeadlinesWhat does this mean?
Stage 1 (AI equity correction), unchanged from the last report; downgrade after five consecutive closes back inside the tripwire. AI economics: Watch, unchanged.
The bad
- The global bond selloff is becoming a major transmission risk. The US 10-year Treasury yield reached about 4.98%, very close to 5%, while the 30-year reached roughly 5.38%, its highest in 19 years. Brent briefly approached $110/barrel.1
- Monetary tightening is moving from risk to reality. The ECB raised rates by 25bp, and markets were pricing a high probability of additional tightening in both Europe and the US.2
- There are early signs of stress spreading internationally, with pressure across emerging-market currencies and global bond markets.
The good
- The crucial systemic indicator remains surprisingly benign: US corporate credit spreads have not started blowing out.3
- There is no evidence yet of a broad AI-capex cancellation cycle.
2ScorecardWhat does this mean?
| Pillar | Status | Trend | Why |
|---|---|---|---|
| AI equities | Watch | Better | The semiconductor index closed 19.2% below its June high on 11 September, back inside the Watch band.4 No equity evidence in the report text. |
| Rates and macro | Elevated | Unchanged | US 10-year at 4.96% at the 11 September close, inside the Elevated band and close to 5%; the report cites about 4.98%, with the 30-year at roughly 5.38%, its highest in 19 years, and Brent briefly near $110.71 The ECB raised rates by 25bp and markets are pricing more tightening in Europe and the US.2 |
| Broad credit (the firewall) | Calm | Unchanged | Investment-grade spread 80bp and high-yield 265bp, both well inside Calm.312 US corporate credit spreads have not started blowing out. |
| AI-specific credit | Watch | Unchanged | No new evidence in this report; status held from the 10 September report. The report argues that rising financing costs push up corporate and data-centre hurdle rates, but records no new AI-specific pricing. |
| AI financing flow | Watch | Unchanged | No new evidence in this report; status held from the 10 September report. |
| Leverage and liquidity | Elevated | Unchanged | No new evidence in this report; status held from the 8 September report. |
| Private credit | Elevated | Unchanged | No new evidence in this report; status held from the 8 September report. |
| AI economics | Watch | Unchanged | No new evidence in this report; status held from the 11 September report. There is no evidence yet of a broad AI-capex cancellation cycle. |
3Change since last reportWhat does this mean?
Compared against the 11 September 2026 report, back-scored the same way. Scores for this report were back-scored on 4 November 2026 from its own text and from FRED and Yahoo Finance closing data, because it predates the scorecard format.
| Last report (11 Sep) | This report | Change | |
|---|---|---|---|
| Stage | 1 (evidence 3 Sep) | 1 (evidence 3 Sep) | Unchanged. The semiconductor index closed back within 20% of its high on 11 September, the first such close since 9 September; five in a row are needed to clear the stage.4 |
| AI economics | Watch | Watch | Unchanged. No new evidence in this report. |
| AI equities | Elevated | Watch | Better. The semiconductor index recovered to 19.2% below its high, from 20.6%, back into the Watch band.4 |
| Rates and macro | Elevated | Elevated | Unchanged. Worse inside it: the ECB’s 25bp hike turns monetary tightening from a risk into reality, and the 30-year is at its highest in 19 years.21 |
| Broad credit | Calm | Calm | Unchanged. Investment-grade unchanged at 80bp; high-yield 5bp tighter at 265bp.312 |
| AI-specific credit | Watch | Watch | Unchanged. No new evidence in this report. |
| AI financing flow | Watch | Watch | Unchanged. No new evidence in this report. |
| Leverage and liquidity | Elevated | Elevated | Unchanged. No new evidence in this report. |
| Private credit | Elevated | Elevated | Unchanged. No new evidence in this report. |
Net: AI equities moved back from Elevated to Watch as the semiconductor index recovered to just inside 20% of its high. Rates and macro is unchanged in status but worse inside it, with the ECB hiking, the 30-year at a 19-year high and early signs of stress in emerging-market currencies. Broad credit did not react.
4Transmission chainWhat does this mean?
- 1 AI equity correction Confirmed 3 Sept Downgrade after five consecutive closes back inside the tripwire
- 2 AI-specific credit stress Partial evidence
- 3 Forced deleveraging Partial evidence
- 4 Firewall breached Not present
- 5 Systemic liquidity event Not present
| Stage | Status |
|---|---|
| 1 — AI equity correction | Confirmed. Entry evidence was the semiconductor index’s fifth close more than 20% below its 52-week high on 3 September. It closed 19.2% below on 11 September, the first close back inside 20% after the 10 September dip; five in a row are needed to clear the stage.4 |
| 2 — AI-specific credit stress | Partial. No new evidence in this report. The one sign recorded on 10 September, higher yields on even collateralised data-centre projects, still stands; the stage needs two independent ones. |
| 3 — Forced deleveraging | Partial. No new evidence in this report. Leverage remains high, but no margin call, fund liquidation or withdrawn credit line has been reported. |
| 4 — Firewall breached | Not present. Investment-grade spread 80bp and high-yield 265bp, far below the 130bp and 450bp tripwires.312 |
| 5 — Systemic liquidity event | Not present. No funding-market malfunction reported. The report notes early pressure across emerging-market currencies and global bond markets, and the ability of central banks to ease quickly is disappearing. |
5JudgementWhat does this mean?
This is a meaningful further deterioration because the global bond selloff is becoming a major transmission risk. With US yields close to 5%, the 30-year at a 19-year high and the ECB already hiking, monetary tightening is moving from risk to reality.12
That materially changes the environment for the AI investment boom: high AI valuations + debt-funded infrastructure → rising real financing costs → nearly 5% Treasury yields → higher corporate/data-centre hurdle rates → less ability for central banks to rescue a downturn. There are also early signs of stress spreading internationally, across emerging-market currencies and global bond markets.
The crucial systemic indicator, however, remains surprisingly benign: US corporate credit spreads have not started blowing out, and there is no evidence yet of a broad AI-capex cancellation cycle.3 The regime has therefore not yet changed to “credit crisis”. But one of the buffers, the ability of central banks to ease quickly, is disappearing.
6Key indicatorsWhat does this mean?
Market data as at the close on 11 September 2026, compared with the close used by the 11 September 2026 report (10 September 2026). Reported figures are carried forward from the report that last cited them until a newer one appears.
| Indicator | Latest | Previous | Change | Tripwire | Source |
|---|---|---|---|---|---|
| AI equities | |||||
| PHLX Semiconductor Index (SOX) | 11,824; 19.2% below its 52-week high (22 Jun) | 11,614 | +1.8% | Stage 1 when more than 20% below its 52-week high for five closes | Confirmed, Yahoo Finance ^SOX4 |
| Nasdaq 100 | 29,368 | 29,104 | +0.9% | Context | Confirmed, Yahoo Finance ^NDX5 |
| KOSPI | 6,910 | 7,034 | −1.8% | Context | Confirmed, Yahoo Finance ^KS116 |
| Rates and macro | |||||
| US 10-year Treasury | 4.96% | 4.95% | +0.01pp | Elevated 4.75–5.25%; Stressed above 5.25%, each for five closes | Confirmed, FRED DGS107 |
| US 30-year Treasury | 5.35% | 5.37% | −0.02pp | Context | Confirmed, FRED DGS308 |
| Brent crude | $118.06 | $120.98 | −2.92 | Context | Confirmed, FRED DCOILBRENTEU9 |
| US dollar index (broad) | 118.21 | 118.08 | +0.1% | Context | Confirmed, FRED DTWEXBGS10 |
| Yen per US dollar | ¥153.71 | ¥154.06 | −0.35 | Context | Confirmed, FRED DEXJPUS11 |
| Broad credit | |||||
| ICE BofA US investment-grade spread | 80bp | 80bp | ±0bp | Watch at 100bp; Stage 4 above 130bp for five days | Confirmed, FRED BAMLC0A0CM3 |
| ICE BofA US high-yield spread | 265bp | 270bp | −5bp | Watch at 350bp; Stage 4 above 450bp for five days | Confirmed, FRED BAMLH0A0HYM212 |
| ICE BofA CCC & lower spread | 1,076bp | 1,070bp | +6bp | Early warning only | Confirmed, FRED BAMLH0A3HYC13 |
| ICE BofA CCC & lower effective yield | 15.44% | 15.33% | +0.11pp | Early warning only | Confirmed, FRED BAMLH0A3HYCEY14 |
| AI-specific credit | |||||
| AI investment-grade premium over the broad index | Not yet reported in the series | — | — | n/a | — |
| Oracle 5-year CDS | Not yet reported in the series | — | — | n/a | — |
| Meta 5-year CDS | Not yet reported in the series | — | — | n/a | — |
| CoreWeave 5-year CDS | Not yet reported in the series | — | — | n/a | — |
| SoftBank 5-year CDS | Not yet reported in the series | — | — | n/a | — |
| Named data-centre project debt | Not yet reported in the series | — | — | n/a | — |
Yahoo Finance ^SOX, daily closes to 11 Sep.
FRED DGS10, daily closes to 11 Sep.
FRED BAMLC0A0CM, daily closes to 11 Sep.
FRED BAMLH0A0HYM2, daily closes to 11 Sep.
Faint vertical lines mark each of the last 5 reports. Dashed red lines are the published thresholds.
What would change our view
Would make it worse (up toward Stage 2): The 10-year moving through 5% and on to the 5.25% Stressed threshold, or the Fed following the ECB with a hike; US corporate spreads starting to widen; a second independent sign of AI-specific credit stress, which would confirm Stage 2; reported margin calls or forced liquidations, which would confirm Stage 3.
Would make it better (down to Stage 0): Four more consecutive closes with the semiconductor index within 20% of its 52-week high, making five in a row.
Would move the AI-economics axis: A broad AI-capex cancellation cycle beginning, or higher hurdle rates visibly delaying data-centre projects.
7SourcesWhat does this mean?
- Reuters — Global bond selloff keeps 10-year US yield near 5% on oil, rate-hike fears (2026-09-11) —
reconstructed-match - Reuters — Wall Street jumps, oil lower ahead of Fed vote next week (2026-09-11) —
reconstructed-match - Federal Reserve Bank of St. Louis (FRED) — ICE BofA US Corporate Index Option-Adjusted Spread (continuous) —
official-data-series - Yahoo Finance — PHLX Semiconductor Index (^SOX) price history (continuous) —
market-data-series - Yahoo Finance — Nasdaq 100 (^NDX) price history (continuous) —
market-data-series - Yahoo Finance — KOSPI (^KS11) price history (continuous) —
market-data-series - Federal Reserve Bank of St. Louis (FRED) — 10-Year Treasury Constant Maturity Rate (continuous) —
official-data-series - Federal Reserve Bank of St. Louis (FRED) — 30-Year Treasury Constant Maturity Rate (continuous) —
official-data-series - Federal Reserve Bank of St. Louis (FRED) — Crude Oil Prices: Brent - Europe (continuous) —
official-data-series - Federal Reserve Bank of St. Louis (FRED) — Nominal Broad U.S. Dollar Index (continuous) —
official-data-series - Federal Reserve Bank of St. Louis (FRED) — Japanese Yen to U.S. Dollar Spot Exchange Rate (continuous) —
official-data-series - Federal Reserve Bank of St. Louis (FRED) — ICE BofA US High Yield Index Option-Adjusted Spread (continuous) —
official-data-series - Federal Reserve Bank of St. Louis (FRED) — ICE BofA CCC & Lower US High Yield Index Option-Adjusted Spread (continuous) —
official-data-series - Federal Reserve Bank of St. Louis (FRED) — ICE BofA CCC & Lower US High Yield Index Effective Yield (continuous) —
official-data-series
Not investment advice. Scoring, tripwires and the persistence rule are set out in How to read the AI Market Watch; terms are explained in the explainers.