This is the archived 2026-10-02 edition; data and text are as of then. Latest: https://ronfi.github.io/ai-bubble/en/ · Version archive

The AI Bubble Against the Dot-com Bubble

Time-sensitive figures current to 2026-10-01Updated when the source is refreshedSource and full text

First edition: 2026-07-02 | Data refreshed through: the 2026-10-01 close (A-shares/Hong Kong 09-30, closed for the National Day holiday until 10-08; external trigger readings to 10-02 03:00 UTC) Method: a deep-retrieval workflow (106 agents / 24 sources / 115 candidate claims → 25 adversarially verified → 22 confirmed, 3 rejected) + first-hand data across three markets (A-shares / Hong Kong / US, each on its own five-year valuation percentile) + the academic framework (Pastor–Veronesi rational bubbles, Greenwood–Shleifer–You). Date conventions: the 2000 history (§1) is fixed fact; institutional figures (IMF / Goldman / GMO etc.) keep their own report dates; this page's first-hand readings (§2.1 / §2.2 / §2.4 / §4.4) are refreshed wholesale to the data date each edition; old values are not kept. Earlier editions are in the archive at the foot of the page.

Evidence grades: ✅ = fact confirmed by adversarial verification | ⚠ = institutional model estimate or opinion (source checkable, not hard fact) | ❔ = accepted history not put through this round's three-vote check | ❌ = rejected by adversarial verification (do not cite).

One-line conclusion: the AI trade is most likely a "real technological revolution plus a localised, layered bubble", not a 2000-style wholesale speculative mania. The timing of any break is academically unforecastable; the right posture is not to guess a date but to diagnose bubble intensity by layer (the three-market data happen to give three temperatures) and monitor trigger conditions. The most transferable lesson of 2000: the break was about 31 months of staged declines, not a one-day crash, and the bottom came about 2.5 years after the top — any response has to be scaled to the whole clearing period, not to the first leg down.

About this public edition: this page is generated by mechanically cropping a research source (source b77d0e8, 2026-10-02). It contains no action plan, positions or stock picks; it keeps only the historical comparison, the current check-up, the scenario framework and the leading-indicator dashboard, with numbers and evidence grades unchanged. Not investment advice.


1. Anatomy of the 2000 dot-com bubble (verified data)

1.1 Crash timeline and shape ✅

Phase Date NASDAQ level Note
Top 2000-03-10 5,048.62 (closing peak) The 10 weeks before the top were exactly when IPO returns were most tempting (see 1.3)
First sharp drop 2000-04 about −25% in a week Around the Microsoft antitrust ruling (4/3) ❔
Full-year 2000 — 4,069 → 2,471, −39.3% With a pronounced rally in summer 2000 in between
Full-year 2001 — → 1,950, −21.1% Another large rally from after 9/11 into early 2002
Full-year 2002 — → 1,336, −31.5% WorldCom / Enron accounting scandals ❔
Trough 2002-10-09 1,114.11 Cumulative −77.9%, about 31 months

Source: Wikipedia (Stock market downturn of 2002 / Nasdaq Composite); annual declines re-computed from independent year-end closes and consistent.

Core conclusion on shape ✅: the break was a staged grind lower (three annual declines of −39% / −21% / −32%, with several 20–40% rallies in between), not a single crash. There was no "bottom day" — the bottom came about 2.5 years after the top. Money that went in after the first sharp drop most likely still had one to two years of pain ahead.

1.2 Valuation at the top ✅

1.3 IPO mania: the quantifiable signature of a top ✅

Metric 1998 1999 Multiple
Internet IPOs 42 289 ~7×
Proceeds $1.96bn $24.66bn ~12.6×
Share of all IPOs 14% (classification-dependent; Ritter's broad basis ~22%) 60% —
Average first-day gain — +90% (29 of the 30 largest first-day gains in history were in 1999; VA Linux +698%) —
Year-end vs. offer price — average +266% (non-internet only +59%), 16 names up more than 1,000% —

Source: WilmerHale's contemporaneous 1999-12-31 report, cross-checked against Jay Ritter's IPO database.

Implication ✅: when these numbers appeared, the top was only 10 weeks away — gains and mania themselves give no timing (the stretch before a top is exactly the most profitable), but they are after-the-fact checkable "accompanying features of a top" and serve as a benchmark for today's AI issuance heat.

1.4 The world after the break ❔ (accepted history from retrieved secondary sources, not three-vote verified)

1.5 Recovery base rates: heavily right-skewed ✅

Statistics on the maximum drawdowns of 6,500+ US stocks, 1985–2024 (Morgan Stanley, Mauboussin & Callahan 2025):

Implication: the outsized returns after a break are concentrated in a very small number of high-quality survivors (the Amazon type). "Buy whatever fell the most" is mathematically doomed to mediocrity or permanent loss; "select survivors with real cash flow" is the only way to be on the right side of a right-skewed distribution.


2. Check-up of the AI market today (mid-2026)

2.1 Aggregate valuation and concentration

Indicator Current reading 2000 comparison Grade
S&P CAPE ≈40–41.6 (2026-07, second highest ever; mean 17.6) peak 44.2 ✅
Leader PE NVDA trailing 28.8x / own 5-year 2nd percentile, PB 21st (10-02 report basis, data 10-01, price 230.86, week +2.6%); 🔴 vs AMD 156.2x / 70th pct / PB ⚠89%, week −2.4% (off its high) — percentile gap 70→68pp, narrowing slightly; US expensiveness is still all in PB: MRVL PB ⚠98%, MU ⚠98%, TSM ⚠97%, ARM ⚠94%, NBIS PE ⚠98% NDX trailing ~250x ✅ (basis caveat: 2000's 250 is trailing, whole index)
Concentration 30 AI stocks = 44% of S&P market cap (JPM 2025-09; updated 2025-10 to 41 stocks = 47%); US HHI at the 97.7th historical percentile markedly lower in 2000 ✅/⚠
Household transmission US household equity exposure about 30% of total assets, much of it via index funds / 401k lower ✅
Implied earnings assumption IMF: for PE to revert to its 10-year median by 2027, S&P / Nasdaq EPS need ~30% / ~35% CAGR (far above analyst expectations) — ⚠ IMF estimate

Reading: aggregate valuation is at "second most expensive ever, behind only 2000", but still some distance from the 2000 peak (the IMF also judges the deviation smaller than historical peaks ⚠); meanwhile concentration and household transmission exceed 2000 — if it breaks, the path is not "a Nasdaq pocket" but "index-level plus household-wealth-level".

2.2 Capex, debt and circular deals (the part that most resembles 2000 telecoms)

2.3 The most important structural difference from 2000 ✅

NVIDIA fiscal 2027 Q1 (to 2026-04-26, SEC 8-K confirmed): quarterly revenue $81.6bn (+85% YoY), of which data centre $75.2bn (+92% YoY).

The 2000 top's valuations rested on loss-making dot-coms and "eyeballs"; today's AI infrastructure-layer valuations rest on realised, audited revenue and cash flow. This is the strongest reason the "78% wholesale crash" scenario cannot be transferred directly — and the core basis on which arXiv 2606.01575 (2026-05) judges "real technological revolution + localised layered bubble".

2.4 Three-market first-hand data: three temperatures of one theme (data to the 2026-10-01 close; A-shares/HK 09-30)

This page's own cross-sectional evidence — the same AI theme runs at entirely different valuation temperatures in three markets (A-share percentiles computed daily on local five-year series; 10-02 report basis, A-shares/HK 09-30, US 10-01; A-shares/HK closed for the holiday until 10-08):

Layer Market / names Reading (2026-10-01 close; A/HK 09-30) Temperature
Hottest: A-share compute chain Valuation Hygon 167.8x / 55th pct (prev 183.7/66, week −8.7%, <90 for twelve periods; PB 74), WUS 44.1x / 89 (↓93), TFC 122.5x / 91 (↓92, watch, GM↓57→54), Envicool 140.5x / 79 (↓83), Foxconn Industrial 24.6x / 74, Montage 80.3x / 57 (↓64), Innolight 46.6x / 53 (↓62); the four high-valuation / accrual / watch items unchanged — all seven fell: the first week since July that the whole chain lost percentile together 🟠→🟡 loosening at high levels
🟢 Structural temperature (#9) — third pattern: core falls alone concentration 42.7→42.9% / 70th pct (flat); share of decliners 77→51% (51st pct), sectors down 89→37% (09-30 was a divergence day, not a broad sell-off); style gap −1.8→+7.8pp (green power +0.1 vs core −7.7), diffusion −1.8→+1.4pp (peripherals −17.5 vs core −18.8, peripherals outperform core for the first time) 🟡 (last week's "back ≥45% with a broad rally ⇒ 🟡" did not fire; but "defensives keep outperforming" held for the first period — needs two consecutive)
Divergent: US Platform layer NVDA 28.8x / 2nd pct / PB 21 (230.86, week +2.6%) vs AMD 156.2x / 70 / PB ⚠89 (615.73, week −2.4%, off its high) — percentile gap 70→68pp 🔴 divergence holds
Expensive in PB MRVL PE ⚠90 / PB ⚠98, MU 62 / ⚠98, TSM ⚠90 / ⚠97, ARM 78 / ⚠94 🔴
neocloud CRWV 88.57, week +1.1%, PB 16th pct, nothing new first-hand since the 09-22 convertible; NBIS 1489x / 98 🔴 (awaiting next 8-K / CDS)
Another dimension: Anthropic 🔴 Public S-1 on EDGAR = 0 (✅ first-hand, full-text search to 10-02) — "flip by end-September" has expired; the fourth postponement is confirmed; pre-IPO perpetuals, third reading: ANTHROPICUSDT 2,034 (5-day −0.21%), OPENAIUSDT 1,572 (5-day −0.99%) — from falling together to flat 🔴🔴 #3 peak holds
Trough: Hong Kong Valuation Tencent 14.2x / 30 (431.0, week −1.3%) 🟡
🔴 Zhipu / MiniMax diverge Zhipu 633.5→641.0 (+1.2%, −73.4% from high); MiniMax 275.2→250.2 (−9.1%, −79.8% from high, new low); neither has responded to the distillation allegations 🔴

Four key marginal changes on 09-30 / 10-01:

① 🔴 #6: long end at new highs, bear steepening deepens, credit spreads start widening: 10Y 5.17→5.29% (09-30, year high), 30Y 5.49→5.64%, 2Y 4.81→4.88%, 10Y−2Y +36→+41bp; real 10Y 2.83→2.93%, breakeven 2.34→2.36 (still real-rate driven); HY OAS 280→312bp (+46bp from the 09-21 low). T6 +0.54→+0.87pp (August core PCE on the revised basis 3.01%, of which 0.36pp is a BEA series restatement, data effect ≈0 — see US Treasury Debt §8.3c). ⚠ New pattern: the Fed path softens (⚠ external report: Kalshi October hike 70→33¢, not independently checked) while the long end is sold — exactly what "term premium taking over under higher-for-longer" looks like; the 10-28 FOMC is the test point.

📌⇒ In the 1999–2000 script the long end peaked in 2000-01, two months before the Nasdaq top; this week the long end is still making highs, so the comparison is still "before".

② 🟡 #9 third pattern: core falls alone, defensives outperform. Three patterns in three weeks (broad rally with crowding → broad sell-off with de-crowding → core alone falls): concentration flat (42.9% / 70th pct), share of decliners back to a neutral 51%, but core 1-month −7.7% vs green power +0.1%, peripherals outperform core for the first time; all seven A-share compute names lost percentile in the same week (Hygon −8.7%). The "defensives keep outperforming = rotation hint" criterion held for one period; two consecutive ⇒ 🔴.

③ 🔴 #3: "end-September" expired, S-1 still 0, fourth postponement confirmed (EDGAR first-hand); pre-IPO perpetuals flat — the market yardstick shows zero reaction to the postponement, consistent with zero filings.

④ 🔴 Second-round divergence among Hong Kong AI names: MiniMax −9.1% to a new low (−79.8% from high) while Zhipu +1.2% stabilises.

3. AI bubble vs. dot-com bubble: differences and transferability

Dimension 2000 internet 2026 AI Lesson transferable?
Peak valuation NDX trailing ~250x, CAPE 44.2 ✅ CAPE 40–41.6 (second highest) ✅; leaders trailing 20–30x Partly — the aggregate is not at the 2000 extreme, but the A-share compute chain and the US narrative layer are at their own extremes
Leader earnings loss-making dot-coms + expectations NVDA $81.6bn of real quarterly revenue ✅ Not directly transferable: "−78% wholesale crash"
Infrastructure financing telecoms borrowed to lay fibre → debt crisis ❔ mostly cash-funded, but bond issuance >$100bn and accelerating since 2025 ✅ Becoming transferable — debt financing is the slope to watch most
Vendor financing / circularity Cisco-style equipment financing ❔ IMF has quantified the circle's self-reinforcement ✅ Transferable — the same mechanism, modern form
IPO / issuance mania 289 internet IPOs, +90% first day ✅ not yet at 1999 levels (AI IPOs hot but share well below 60%) ❔ A transferable leading indicator — watch the issuance share drift toward 1999
Concentration / transmission relatively contained (though S&P also −49% ❔) 30 stocks = 44% of S&P, HHI 97.7th pct, household exposure 30% ✅ Worse — a break would transmit more widely than 2000
Revenue mismatch revenue essentially zero native layer ~$55–80B run-rate vs $1T+/yr invested, closing fast ⚠ Half transferable — the mismatch exists but the direction is improving
Expected shape of a break 31 months of staged declines ✅ if it breaks, similar mechanics (several false bottoms and rallies) Transferable — any response must be scaled to the whole clearing period, not the first leg

4. Probability and timing of a break: an honest framework

4.1 The academic floor: timing is unforecastable ✅

Greenwood–Shleifer–You (JFE 2019; US 1926–2014 + international 1985–2014):

  1. A sharp industry run-up on average does not predict low subsequent returns — "it rose too much" alone cannot call a top (the stretch before a top is exactly the most profitable; see the 1999 IPO data).
  2. But sharp run-ups raise crash probability markedly: after a 100% two-year rise, the probability of a 40%-class drawdown within two years is about 53% — that precondition (~100% in two years) already holds for the AI leaders.
  3. Accompanying features (rising volatility, rising turnover, heavy new issuance, an accelerating price path) help predict the eventual crash.

arXiv 2606.01575 (2026-05) argues explicitly that bubble frameworks are for diagnosis, not deterministic prediction — markets can correct years after showing bubble features, or digest valuations through earnings growth. Any "forecast" naming a specific date is false precision.

4.2 The spectrum of institutional views (mid-2026) ✅

Camp Representative Judgement
Bubble GMO (Grantham/Chancellor, 2026-01) "We are in a US equity and AI bubble"; most investors will suffer large losses at some stage; no date given
Layered middle arXiv 2606.01575 (2026-05) real technological revolution + localised bubble: infrastructure leaders = boom; private foundation-model firms, weak-moat application layer, aggressively assumed data-centre projects = the bubble layer
Official caution IMF GFSR (2026-04) valuations high but the deviation from fair value is far below historical peaks; names circular deals and debt financing as risks

Not one of them gives a date for a break.

4.3 Scenario framework and subjective probabilities (⚠ this report's judgement, not confirmed fact)

Based on the GSY base rate (53% / two years / 40%-class), the layered evidence and the three-market cross-section, subjective scenario probabilities:

Scenario Description Subjective probability Timing clues
A. Layered rolling clear-out (base case) the narrative layer (loss-making neoclouds, weak applications, high-percentile A-share compute names, Arm/DDOG-style pricing) is repriced in stages, −40 to −70%; the platform layer corrects −20 to −35% and is caught by earnings; index-level drawdown 20–30% ~45% rolls through 2026H2–2028, no single "break day"
B. Systemic sharp break (2000 replay) trigger chain: collective capex-guidance cuts / a neocloud credit event / macro tightening → a 31-month-style grind, Nasdaq-level −50%+ ~25% if it happens, most likely 6–12 months after capex growth peaks; watch 2027 ± 1 year (the Goldman/IMF life and utilisation assumptions and the "EPS 30–35% CAGR to digest valuations" test all come due in 2027–2028)
C. Earnings digestion, no break native-layer revenue keeps closing the mismatch at ~3×/yr ($55B→$150B+); valuations tread water while EPS grows into them (a continuation of 1995–98 or 2023–26) ~30% lasts several years

If "when" must be answered: the window with the highest probability density is 2027 ± 1 year — not because a date can be computed, but because three evidence lines "hand in their papers" then: ① the chip-life / utilisation assumptions in Goldman's capex model start to be adjudicated by actual depreciation and returns; ② the IMF's "EPS needs 30–35% CAGR" reversion test falls in 2027; ③ if issuance / debt heat is extrapolated at the current slope, it approaches 1999-style readings around 2027. Treat this as scenario reasoning, not a forecast — per §4.1 the timing is inherently unforecastable, and any response hangs on triggers, not on the calendar.

Appendix: ranking of detonators for a crash before 10/31 (worked out 2026-08-22; ⚠ all conditional probabilities — conditional on "a crash occurs", not predictions of a crash)

Framework: timing is unforecastable (§4.1), so this is only a "pre-written post-mortem". Background pattern = "denominator relief (#6 turning dovish) + supply extreme (#3 peaking)", i.e. the 1999Q4 pattern; the 2000-03 top was detonated by the issuance side, not the earnings side. The six calendar-densest weeks in the window = late September to late October (S-1 flip end-August → roadshow September → FOMC 9/15–16 → new fiscal year 10/1 → Anthropic IPO pricing mid-October → FOMC 10/27–28 → big-tech Q3 earnings late October).

Rank Detonator Conditional probability Mechanism Warning indicators (all monitored)
① Anthropic IPO pricing / break-issue event (October) ~25–30% three layers: a $100bn raise = the largest liquidity drain ever (SpaceX precedent: −45% itself post-listing); pricing at $1.2–1.5tn → four-tier ladder repriced −25 to −40% and the write-down flows straight into AMZN/GOOGL P&L (19pp of S&P's +48% earnings growth is paper revaluation gains) → #5 ignites automatically through accounting; a broken issue = this cycle's "AOL–Time Warner moment" S-1 audited revenue vs the $65bn run-rate; secondaries / perpetuals falling during the roadshow; pricing range vs the $2tn discount
② AI credit event (CoreWeave/Oracle) ~15–20% CRWV debt $35.6bn + covenants locked + deferred-revenue reclassification questions; Oracle BBB- / FCF −$23.7bn; Moody's "weakest credit link"; 2000 telecom order = credit cracks first, equity crashes after; more likely ignited by ① or ③ than independent CDS spreads (criterion not converged); refinancing terms; rating actions
③ NVDA 8/26 short of a "big beat" ~15% expectations ($93–95bn) > guidance ($91bn); "in line" could be read as a miss; alone = a correction, but it is the fuse for ① and ② verified directly four days later
④ Hawkish Fed surprise (9/15–16 or 10/27–28) ~10–15% hike odds cut to ~25% and positioning set for denominator relief = asymmetric; Warsh "no soft target" + three voters already voted for a hike in July; stacked with ① = a full 1999→2000 replay September CPI; FOMC vote structure
⑤ Geopolitical jump (Taiwan Strait / tech-war escalation) ~10% lowest probability, highest intensity, entirely unwarnable (§5 item 6: "low platform percentile = safe" fails in a Taiwan scenario); FCC category bans / H200 quotas / White House accusations against Moonshot = the slope is steepening none — exposure can only be limited in advance
⑥ Technical liquidity stack (shutdown 10/1 + refinancing + $100bn drain) ~5–10% an amplifier, not a detonator; three events in one month shutdown talks; Treasury issuance calendar
— A-shares detonate on their own ~5% #9 rotation to zero / concentration breaking the line / hot chain cooling — a follower pattern, not a detonator pattern —

Composite judgement: if a crash occurs, the most likely post-mortem is one chain — NVDA short of a "big beat" (8/26) → compute narrative cools → Anthropic roadshow cold / priced at a discount (October) → AMZN/GOOGL revaluation reverses + CRWV spreads blow out → earnings and credit light up together → late-October Q3 earnings confirm. The single highest-weight event = Anthropic's IPO pricing day (a liquidity, accounting and narrative event at once).

Scoring rules, pre-registered (2026-08-24; not to be revised after a trigger): 1. Adjudication date: 2026-11-01; 2. Crash definition (equity side, mechanical threshold): NDX close ≥15% below its highest 2026 close, on any trading day up to and including 10/31 ⇒ "occurred". NDX is chosen because this cycle's AI concentration is highest there and it maps directly onto the chain above; one threshold, no discretion. (Crypto-side counterpart: BTC Binance perpetual close < $58,605, registered separately); 3. Detonator "hit" criterion: within 7 calendar days before the start of the crash's initiation leg, at least one of that detonator's warning indicators has fired and it is the earliest to fire among all detonators. Initiation-leg start (equity side) = during the fall to −15%, the first trading day with a single-day close ≤ −3.5%; absent such a day (slow-grind form), the first trading day the drawdown closes beyond −10%. Equity and crypto post-mortems are written independently then reconciled; disagreements kept as dual records; 4. Three-branch scoring: occurred → score ranking quality + warning lead; did not occur but ≥2 classes of warnings fired → score a false alarm and grade each indicator; did not occur and quiet → examine which counter-argument (the counter section of this §4.3 appendix) did the work; 5. The probability numbers themselves are not scored — a single event cannot calibrate probabilities (the table's probabilities are subjective declarations, calibration history n=0, not to be adjusted after the fact); only the ranking and warning lead are scored, which is all that n=1 can honestly test. 6. Reading rules for adjudication (added 2026-08-30: thresholds untouched, only the reading pinned; not a character of the thresholds has changed since registration): ① denominator basis: "highest 2026 close" = the rolling high as seen from the adjudication date (on any adjudication day t only the highest close in [2026-01-01, t] may be used — if a new high is made before adjudication, the base moves up with it, a natural property of a drawdown definition, not drift, no discretion); ② adjudication series pinned: NDX closes are Nasdaq's official index closes (channel ^NDX; index closes differ from futures settlements and are not revised after the fact, so no T+2 wait; in the rare event of a vendor correction, the corrected value governs with both values recorded); ③ numerator and denominator from the same series on the same basis — no futures/ETF numerator against an index denominator.

⚠Boundary statement on the calendar argument: "September–October is calendar-densest" in this appendix describes event concentration; it is not a basis for action — all-green warnings with the calendar arriving constitute no reason to do anything; the calendar answers only "if it breaks, roughly when", never "will it break".

🔴Scoring the first link of the chain (2026-08-27; NVDA Q2 FY2027 results in):

Result = big beat; the first link did not fire. Revenue $96.2bn (+106% YoY, +4.4% above the $92.2bn consensus and through the top of the $93–95bn whisper range); adjusted EPS $2.22 (expected $2.10); gross margin 75%, no erosion; data centre +117%; Q3 guidance $108bn ±2% (expected $104.2bn, +3.6% above); the call guided FY28 revenue growth ~70%; ⚠ guidance counts China data-centre revenue as zero — any easing of controls is pure upside.

Precise path of the event shock (Binance NVDAUSDT stock perpetual, 5-minute bars, 08-26 UTC): | Time | Price | Event | |---|---|---| | 19:00 | 211.45 | pre-release | | 20:20 | close 208.05, wick low 203.80 (volume 589k = 20× normal) | sell-the-news at release, −3.6% | | 21:00 | 214.87 | call begins | | 21:20→21:50 | 218.69 → peak 220.45 | FY28 +70% guidance ignites | | 23:20 | 218.44 | holds the high |

Reading: ① net event shock +3.2 to 4.3%; the results were not priced in beforehand — but the real incremental information was not the Q2 numbers (absorbed by the whisper, hence −3.6% at release) but the call's FY28 outlook; ② #5 (leader earnings-miss chain) clearly did not light this round: the "expectations above guidance = tiny margin for error" risk was actively repaired before results (sell-side estimates fell back to $91–92B), and the actual result far exceeded even the repaired expectations; ③ by the §4.3 ranking, detonator ③ (NVDA short of a "big beat", ~15% conditional) did not hit — the chain's starting point failed, so ② (credit) and ① (Anthropic IPO) lose this fuse, but their independent paths are unaffected.

⚠Same-day macro headwind: July core PCE +0.2% m/m (below expectations) but 3.3% y/y, headline PCE 3.7% y/y (the expected fall to 3.6% did not happen); Q2 GDP 1.5% not revised down; real consumption ~0% m/m. Fed funds 3.50–3.75%, unchanged in 2026; September cut odds ~1%, hike 33–40%, cumulative hike odds for the year ~70% (largest window 12/8–9) — #6's hawkish undertone is stronger than the mid-August "turning dovish" reading; the trigger must be re-assessed in the next report.

4.4 Leading-indicator dashboard (triggers, ranked by historical reliability)

# Indicator 2000 counterpart Current status Meaning if triggered
1 First collective cut to hyperscaler capex guidance telecom capex inflection led the Nasdaq bottom ❔ 🟡 Forward-looking turn negative (07-28→08-03): capex is still being raised collectively, no cuts (big six 2026 total $725bn / +77% YoY; MSFT FY27 $255–260bn), but the market now prices by "is the capex→revenue loop visible" — MSFT Azure 43% → guided 45%, stock +1.9%; AMZN AWS +37%, capex $220bn, +9%; Meta adjusted EPS miss ~13%, −5%; Apple spends almost nothing on AI capex, services miss, −7%. TSMC's July capex raise to $60–64B was read as a warning (SOXX −5% / Micron −13%) the most reliable top signal; ⚠ reading revised: the market rewards not "restraint" but "spending that yields visible returns" (Apple as the counter-example) — the original definition "collective capex cut" has partly failed as a top signal; watch #5 (earnings/returns) instead
2 AI bond / neocloud credit spreads widen, refinancing fails telecom default wave ❔ 🔴 Holds (10-02): no new CoreWeave 8-K/424B5 since 09-22 (checked to 10-02), CRWV 88.57 / PB 16; broad HY OAS 266→312bp (+46bp in nine days) — not this box, but the 09-14 premise "nobody demands a risk premium" has changed; the AI borrowers' mark-up has gone from outlier to leading value debt-financing slide confirmed; primary-market terms are the hardest credit signal
3 Issuance mania approaching 1999 levels (AI IPO / secondary share → 60%, first day +90%) ✅ quantified benchmark in §1.3 🔴🔴 Peak holds (10-02): ✅ EDGAR S-1 = 0 (to 10-02), "end-September flip" expired ⇒ fourth postponement confirmed; pre-IPO perpetuals flat: ANTHROPICUSDT 2,034 (5-day −0.21%), OPENAIUSDT 1,572 (−0.99%) GSY accompanying feature "heavy issuance"
4 Circular-deal share keeps rising (IMF attribution pp widening) vendor financing ❔ 🟡 New reading (07-06 special check): the Anthropic triangle is official (NVDA $10bn + MSFT $5bn equity ↔ $30bn Azure purchases) but its circle is "smaller and more convergent" (net cash outflow, multi-cloud); the OpenAI circle is more leveraged (NVDA up to $100bn + Oracle $300bn contracts); analysts estimate 2026 AI circular financing >$800bn; 08-12 upgrade (SEC-grade evidence): Amazon's 10-Q discloses a "double loop + explicit vendor financing" — AWS↔Anthropic commercial commitments >$100bn / 10 years + a $20bn milestone facility (Anthropic can draw only after AWS delivers compute; a draw = Amazon subscribing to its convertibles), replicated with OpenAI (+$100bn commitments / $50bn equity); Google's exposure = four layers of equity + committed capital + lease guarantees + credit derivatives (max $43.8bn); plus an Apollo/Blackstone-led $35bn SPV buying TPUs for lease-back (chip risk off balance sheet); NVDA's new deals >$750bn draw fresh questions; BIS (06-28) / BoE (07) both list "opaque circular financing" as a systemic fault line (separate study) self-reinforcement critical point
5 Leader earnings-miss chain (NVDA / hyperscalers miss and cut for two consecutive quarters) Cisco 2001-02 ❔ 🟢 Not lit but cracked (07-30→08-27): Meta 26Q2 adjusted EPS $6.18 vs $7.13 expected (miss ~13%, revenue $60.8bn beat — a "spend more, earn less" miss); Apple services miss, −7%; the definition needs "two consecutive quarters of miss + cut", so not lit. NVDA 08-26 Q2 FY27 big beat (revenue $96.2bn / +106%, Q3 guide $108bn, FY28 growth ~70%); the chain's first link did not fire (see §4.3 appendix) the cash-flow-support argument fails; ⚠ new judgement: the most dangerous turning point has moved from #1 (capex) to #5 (earnings) — capex can be raised without punishment (Microsoft), an earnings miss is punished at once (Meta)
6 Fed back to tightening six hikes to 6.5% in 1999–2000 ❔ 🔴 Long end at highs + credit widening (10-02): 10Y 5.29% (09-30, year high), 30Y 5.64%, 2Y 4.88%, 10Y−2Y +41bp; real 10Y 2.93%, breakeven 2.36; HY OAS 312bp (+46bp since 09-21), IG 84; EFFR 3.88, WALCL $6.743T (−$4.7B); T6 +0.87pp (August core PCE revised basis 3.01%, 0.36pp restatement); test point 10-28 FOMC standard feature of historical tops
7 Breadth deteriorates + volatility rises + accelerating advance (GSY features) ✅ 🟡 concentration already extreme (HHI 97.7th pct), an acceleration leg exists probability tier raised
8 A-share / US micro signals: A-share compute chain broadly >95th pct + spreading accrual red flags; US narrative layer PE 400+ expanding — 🟠 Tenth period of steady state, week +4.6% in step with crowding (09-18): Hygon 178.6x / 61 (prev 170.8/59), WUS 46.9x / 92 (↓94), TFC 133.7x / 93 (watch), Envicool 164.8x / 87, Foxconn Industrial 26.5x / 77; Desay 1st pct. ⚠ Hygon is one of the vehicles of #9's crowding; if concentration ≥50%, on 7/10 it hit the 100th percentile that day. the "hot layer" of a layered bubble confirmed
9 A-share market structural temperature (crowding = top-5% names' share of turnover, 50% threshold / divergence / diffusion / style rotation; after Zheshang Securities' "water temperature" framework, computed daily over the whole market) extreme turnover concentration in 1999–2000 ❔ 🟡 Third pattern: core falls alone (10-02, data 09-30): concentration 42.9% / 70th pct (flat); decliners 51% (neutral); style +7.8pp (green power +0.1 vs core −7.7), diffusion +1.4pp (peripherals outperform core for the first time); all seven compute names lost percentile in the same week. The "defensives keep outperforming" criterion held for one period; two consecutive ⇒ 🔴; closed until 10-08, next reading 10-09 same direction as #8: re-inflation + rotation exhaustion = the market re-embracing compute before NVDA's 8/26 results; the beta tailwind for the defensive / value line is near its end

Dashboard status snapshots (rolling)

Date Snapshot Overview
2026-07-02 (first edition) #8 🔴; #2/#3/#4/#7 🟡; #1/#5 🟢; #6 to be tracked the micro hot layer is lit; nothing confirmed at system level
… (23 intermediate editions omitted; period-by-period readings are in the source's snapshot history)
2026-09-11 (data 09-10; triggers to 09-11 02:00 UTC) 🔴 A new exogenous variable enters: oil — Brent $107.81 (+23.8% from the 8/13 low, 5-day +12.8%; US–Iran escalation + Saudi August output down ~1.9m b/d, a real supply shock) ⇒ pushes both breakevens (2.31→2.40) and real rates (10Y 4.94, cycle high / 30Y 5.28 / MOVE 73→82); ✅ long-end quantity test passed, strongest of three auctions: 09-10 30Y reopening stopped at 5.308% = highest since 2001 but primary dealers took only 2.2% (9.2% on 08-13), indirects 79.3%, bid-to-cover 2.61 ⇒ T2 not triggered; "price clearing substitutes for quantity rejection" re-confirmed; curve still bear-flattening (30Y−5Y 0.74→0.67) ⇒ still pricing a central-bank reaction, not a fiscal premium; 🔴 US divergence widens: NVDA 218.36 / 0th pct (this time by price: −2.2%→−7.3% from high) vs AMD 132.2x / 67th pct / YTD +125.4% (week +5.4%), gap 61→67pp; #9 crowding 44.3% / 81st pct nearing the heating line, 09-10 broad sell-off (81% of names / 87% of sectors), style gap +5.8pp, defensives outperform for a second period; #2/#3 no new readings (no CoreWeave 8-K since 08-12, only insider sale plans; Anthropic S-1 missed three times); ⚠ August CPI due 09-11 12:30 UTC, after this refresh 🔴×3 + 🟠×1 + 🟡×1 + 🟢×1 (#6 back from 🟠 to 🔴); the main thread turns from "denominator suspended" back to "denominator pressure rising", but the presser is oil, not the Fed; ⚠ long-end demand is stronger, not weaker ⇒ the pressure is in [price], not [clearing capacity]; test points 09-11 CPI → 09-16 FOMC
2026-09-14 (data 09-11, weekly; triggers to 09-13 23:50 UTC) 🔴 #6 reverses direction — the only grade-level change this period and the most informative: ✅ the pending 09-11 CPI test point has landed — August core +0.3% m/m, 0.1pp above expectations but the annual rate fell 2.5→2.4%, headline 3.4% (gasoline +3.9% contributed over a third of the monthly rise); 🔴 FedWatch for 09-16 moved from "hike 62.4%" (09-10) to "85.5%" (09-12) = the market flipped entirely from cut to hike; ⚖ reading: the core annual rate is falling while hike bets surge ⇒ the market prices the [central-bank reaction function], not the [inflation level], same direction as last period's "pricing a Fed reaction, not a fiscal premium"; ⚠ probabilities conflict across sources (56/62.4/66/85.5%), direction only, no number; ✅ T6 = +0.29pp, confirmed the same day against FRED first-hand series: the earlier flag "core PCE 3.34% above core CPI 2.4% is the reverse of the textbook norm, suspend" was overruled by an external check using PCEPILFE/CPILFESL, correctly — the inversion has held for six straight months (Feb–Jul), caused by shelter (≈40% of CPI, y/y down to 3.03%, dragging CPI; only ≈15% of PCE). 🔴 The error was not a misread number but [citing a mechanism's name without running the mechanism]: the weight difference alone does not set the sign; weight difference × the sign of shelter's relative inflation does — a conditional relation was treated as a constant one. ✅ The net gain is worth more than the retraction: the market is reacting to the 2.4% CPI headline while the Fed's own gauge (core PCE) is still at 3.34%, 0.9pp higher ⇒ on top of "pricing the reaction function": by inflation level, the Fed's gauge is hotter too; a hike widens it to +0.54pp; 🔴 #9 crosses the heating line: crowding 44.3→45.8% / 90th pct, decliners 81→88% (96th pct), sectors down 87→98%, style gap +6.6pp, defensives outperform for a third period; ⚠ narrower diffusion (−6.5→−3.4pp) is caused by the core catching down — core 3-month −7.0→−12.7%, nearly doubled, the single most informative number this period; #2 equity side weakens (CRWV loss-making / ROE −43.6% / 1-month −17.4%; Nebius PE 1462.6x / 99th pct) ⇒ the equity–credit divergence converges by [equity toward credit]; ⚠ new backdrop: broad HY OAS 270bp = richest decile; 🔴 must not overwrite the AI credit box — it amplifies the anomaly; ⚠ #2/#3 EDGAR not checked this period (budget went to #6 and the CPI), no new reading, no score, no inference; where the US is "expensive" has moved: NVDA 27.3x / 0th pct + PB only 17th (first on all three quality items) vs Micron PB ⚠96% / YTD +209%, Marvell PB ⚠96% / YTD +165% ⇒ expensive in PB, not PE; NVDA–AMD gap 67pp flat (stopped widening, not converging); 🔴 the two named pure-AI names' excess declines widen: Zhipu 1-month −39.8%, MiniMax −28.3% (day −7.5% / −78.2% from high) vs sector peers SenseTime −8.4% / 4Paradigm −7.6% / UBTech −14.2% ⇒ the "AI purity × named" excess-decline judgement continues to hold, and widens 🔴×3 + 🟠×1 + 🟡×1 + 🟢×1 (same count as last period, but #9 went from "approaching" to "crossed" and #6 from "pressure rising" to "direction reversed" — deteriorating within grade); main thread: the A-share changes are all in structure, not valuation (valuation in steady state for nine periods while core losses doubled, concentration crossed the line, defensives outperformed three periods); next global nodes 09-16 FOMC → 09-25 core PCE (actually released 09-30)
2026-09-21 (data 09-18, weekly; triggers to 09-20 23:50 UTC) 🔴 #6 goes from expectation to fact: FOMC 09-16 hiked 25bp, 12–0, to 3.75–4.00%, dots 16/18 see more, 4 see two — the counterpart of 1999–2000's six hikes is in progress from this week; 10Y 5.004% through 5, 2Y 4.743% (highest since 2024-07), curve +26bp bear-flattening; T6 +0.29→+0.54pp, ignition deferred as foreseen (recomputed on the 09-25 core PCE); 🔴 #9 pattern reverses: concentration 45.8→48.5% / 96th pct, 1.5pp from the red line, but decliners 88→21%, sectors 98→11% (broad rally day), style gap +6.6→−1.0pp (defensives reverse after three periods) ⇒ from "general retreat + flight to the head" to "broad rally + heavier crowding", closer than last week to the pattern before the early-July breach; #8 tenth period of steady state (Hygon 178.6x / 61, week +4.6% in step with crowding); 🔴 #2 third first-hand point and the instrument changed: CoreWeave 09-17 8-K, $3bn convertible 2033 + capped call, coupon / conversion price undisclosed — a convertible at 675bp CDS = third stage of credit tightening (pricing → repricing → instrument change), equity −8.6% / PB 5th pct the same week, consistent; 🔴 #3 fourth postponement confirmed (EDGAR first-hand 0, comparison valid) but at last there is a market yardstick: pre-IPO perpetuals enter the record, Anthropic 5-day −0.02% vs OpenAI +7.26%, first reading = divergence; US percentile gap 67pp flat for a third period (NVDA 27.8x / 1 / PB 18 vs AMD 142x / 68 / PB 87, week +8.5%), expensiveness still all in PB (MRVL 98 / TSM 94); 🔴 Zhipu / MiniMax six-day losing streak ends: 09-14→18 Zhipu +8.2%, MiniMax +20.0% (day +18.9%), ✅ cause = spill-over from Zhipu raising its ARR target to $3bn on 09-17; 🔴 neither has responded to the distillation allegations, and Talkie's delisting is still undisclosed ⇒ the fall was event-driven, the bounce guidance-driven; overdue-criterion scan 0 🔴×3 + 🟠×1 + 🟡×1 + 🟢×1 (same count, but #6 rises from "reversal" to "cycle begun" and #9 from "crossed" to "heavier crowding" — both point to the second stage of 1999Q4: denominator tightening is fact while the supply side keeps crowding); main thread: last week denominator pressure, this week denominator pressure [landed] + structural crowding [rebounded]; both at once is the precursor pattern of §4.3 scenario B; next node 09-25 core PCE (T6 recompute; actually released 09-30) → end-September fourth ruling on the Anthropic S-1
2026-09-28 (data 09-24/25, weekly; triggers to 09-27 23:50 UTC) 🔴 #6 bear-flattening turns to bear-steepening, real-rate driven: 10Y 4.96→5.17% (09-24 5.18, year high), 30Y 5.49%, 10Y−2Y +26→+36bp; real 10Y 2.62→2.83% while breakeven 2.33→2.34 unchanged = the three-day +21bp is all real rates; HY OAS 266→280bp; T6 +0.54pp (10-01 addendum: August core PCE out 09-30, revised basis 3.01% ⇒ +0.87pp, of which 0.36pp restatement, data ≈0); 🟢 #9 crowding dissolves on a broad down day: concentration 48.5→42.7% / 69th pct (−5.8pp), decliners 21→77%, sectors 11→89%; last week's "≥50% with a broad rally ⇒ 🔴" criterion went the opposite way — a two-week flip reads as instability, not cooling; #8 eleventh period of steady state (Hygon 183.7x / 66, week +2.9%); 🔴 #2 fourth first-hand point: CoreWeave 09-22 8-K, convertible completed and upsized to $4.2bn, 2.875%, 22.5% premium; the same 8-K lists straight-note coupons of 8.5–9.75% — the door for debt is closing, the equity-linked door is open; equity +7.7% the same week; 🔴🔴 #3 S-1 still 0 (all 6 full-text hits are third-party mentions), two sessions left to the end-September flip, pre-IPO perpetuals fall together −3.7 / −4.2%; 🔴 Hong Kong: Zhipu −18.8% / MiniMax −9.2%, last week's five-day bounce fully given back with new lows (short-covering verdict: yes); AMD +12.6% to a new high the same week, NVDA/AMD gap 67→70pp #6 flat-to-steep is the only grade-level change; #9's two-week flip = instability; #2 credit tight on debt, open on equity-linked
2026-10-02 (data 09-30/10-01, interim refresh for the public edition; triggers to 10-02 03:00 UTC) 🔴 #6 long end at new highs, bear steepening deepens, credit widens: 10Y 5.29% (09-30, year high) / 30Y 5.64% / 10Y−2Y +41bp, real 10Y 2.93 with breakeven 2.36; HY OAS 266→312bp, +46bp in nine days; T6 +0.87pp (August core PCE revised basis 3.01%, 0.36pp BEA restatement, data ≈0); the Fed path softens while the long end is sold (Kalshi October hike 70→33¢, ⚠ external report); 🟡 #9 third pattern: core falls alone — concentration 42.9% / 70th pct flat, decliners 51% neutral, but core 1-month −7.7% vs green power +0.1%, peripherals outperform core for the first time, all seven compute names lose percentile in the same week (Hygon 183.7→167.8x / 66→55th pct); the "defensives outperform" criterion held one period, two consecutive ⇒ 🔴; 🔴🔴 #3 S-1 still 0 and "end-September" expired = fourth postponement confirmed, pre-IPO perpetuals flat; #2 nothing new first-hand (CRWV +1.1%); Hong Kong: MiniMax −9.1% to a new low, Zhipu +1.2% stabilises; ⚠ A-shares/HK closed until 10-08 #6's long-end high is the only grade-level change; #9 turns from "de-crowding" to "core falls alone"; #3's postponement confirmed

5. Limits of the evidence and open questions

  1. Rejected claims (do not cite): NDX rose 5× in 1998–2000 and the bubble was confined to the Nasdaq (0–3); median single-stock drawdown 85% / median 2.5 years to bottom (1–2); 54% of stocks never regain their prior high (1–2).
  2. Coverage gaps (outline items that did not get three votes, marked ❔ in the text): the Fed's 1999–2000 hiking path, the Microsoft ruling's timing, specific single-stock peak/trough figures, fibre utilisation, the 2000–02 value factor, details of Buffett's behaviour, a quantitative review of the 2002-10 / 2003-03 double bottom, current credit spreads and neocloud debt detail.
  3. Basis traps: NDX 250x is trailing (forward ~60x); "AI revenue <$50B" refers to the native layer only and is dated (mid-2026 run-rate $55–80B); the IMF's circular-deal attribution arithmetic is questionable (may understate ~3×).
  4. Timeliness: IMF GFSR 2026-04, Goldman 2026-05, NVIDIA results 2026-05, GMO 2026-01 — AI data iterate extremely fast; this page's valuation cross-section is as of 2026-07-02, and trigger readings need updating each weekly edition.
  5. Open questions: real-time item-by-item readings of the GSY accompanying features (especially AI issuance share vs 1999's 60%); where responsibility for continuous monitoring of neocloud debt and spreads sits; clarification of the IMF attribution arithmetic.
  6. Unmonitorable jump risk: the Taiwan Strait (added 2026-08-10) — this dashboard deliberately admits only "readable" leading indicators (percentiles / thresholds / daily frequency); a Taiwan conflict is an unforecastable jump, and including it would create an illusion of "monitorability", so it stays out of §4.4; its magnitude (external estimates of a full conflict: about −9.6% of global GDP in the first year) is a tail risk outside this framework and must be treated explicitly outside the dashboard.

Disclaimer

This page is a research note. It is not investment advice and constitutes no recommendation to buy or sell, and no promise of returns.

The scenario probabilities in §4.3 are subjective declarations, not calculations; a single event cannot calibrate a probability, so this page scores only ordering and early-warning lead, and the declarations are never adjusted after the fact. “2027 ± 1 year” is where three lines of evidence come due — it is not a date forecast; the position of this page is precisely that timing is academically unforecastable (§4.1).

The nine leading indicators in §4.4 are criteria for observation, not trading signals. Thresholds and adjudication sources are fixed at registration and never revised after a trigger; their purpose is to make “what happened” adjudicable, not to time entries or exits.

The evidence grades are part of the content: ✅ confirmed by adversarial verification, ⚠ institutional model or single source, ❔ accepted history not re-verified in this round, ❌ rejected (do not cite). A screenshot that crops the marker reads as a claim this page does not make.

Time-sensitive figures carry an explicit cut-off, stated in the masthead and throughout; the three-market percentiles are refreshed weekly, old values are not kept in the text but every edition stays openable in the archive. Overturned claims are kept beside their corrections: errors stay in place and are not rewritten away.

Support

This project will stay free and public for the long run. If this comparison ever turned the word bubble from a slogan into checkable numbers for you, that is what it is for. Your support keeps it maintained; any amount is sincerely appreciated. The addresses in DONATE.md on the main branch are the only authoritative source; do not use any address you see anywhere else, however similar it looks.

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