How bubbly are we?244 / 400Horsemen Index · Σ of I+II+III+IV
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Week read · Mixed

WEEK ENDING SATURDAY, OCTOBER 3, 2026

Mixed (+8): Anthropic pre-Thanksgiving, OpenAI private bridge, second Lipper inflow

How bubbly: 244/400. CAPE 41.38 keeps Overvaluation in the rare ≥40 regime; Anthropic’s Nov 9 marketing / pre-Thanksgiving path lifts Issuance while OpenAI stays off 2026 and shops a ~$30B private bridge at ~$1.4T. Beliefs stay mixed on safety language versus the racing IPO window; a second Lipper inflow week firms Inflows without a new-entrant stampede. Mixed.

How bubbly are we?244 / 400Horsemen Index · Σ of I+II+III+IV
I Overvaluation76
II Bubble beliefs58
III Issuance60
IV Inflows50

III with megas 60without SpaceX·Anthropic·OpenAI 54

Soft +8 from Sep 26 (236), mostly Issuance: Anthropic’s Nov 9 marketing / pre-Thanksgiving path lifts III; CAPE stays ≥40; beliefs mixed; second Lipper inflow firms IV without a new-entrant stampede.

Overvaluation

  • ADVANCE

    Shiller CAPE still north of 40 (Multpl 41.38 Fri Oct 2).

    Sources
  • ADVANCE

    Anthropic ~$1.8T–$2T ask beside a $518B compute bill — Bloomberg mid-November path vs May $965B Series H; Reuters prospectus read puts ~$518B infrastructure commitments and Broadcom up to $42B TPU-lease financing.

Bubble beliefs

  • MIXED

    Safety talk and a racing IPO share the stage — Anthropic existential-risk prospectus language beside a firm pre-Thanksgiving marketing window; Altman keeps OpenAI off 2026 while shopping private capital.

  • CONTEXT

    New Owenomics: The quants of Babylon — October Acadian note is systematic-investing / Babylonian-data; Sep IPOs of doom remains the Anthropic-frame Lamont piece.

Issuance

  • ADVANCE

    Anthropic: marketing week of Nov 9 · trade before Thanksgiving — Bloomberg Oct 1; plans can change; Oct 14 SF investor meetings on prep calendar; confidential S-1 still not on public EDGAR.

  • MIXED

    OpenAI: ~$30B private bridge at ~$1.4T, not a 2026 IPO — Bloomberg/TechCrunch bridge financing after Altman took 2026 off the board. Private mega capital without a public listing date.

  • ADVANCE

    Dangote Refinery IPO still open through Oct 13 — Africa’s largest-ever share sale keeps the non-U.S. mega secondary track warm.

    Sources

Inflows

  • ADVANCE

    U.S. equity funds: ~$20.6B inflows (week through Sep 30) — Second straight Lipper U.S. equity inflow week after ~+$37.5B the week before — large-caps ~+$19.3B; sector tech sold ~$3.79B. Lipper remains digest color, not the IV spine.

    Sources
  • MIXED

    Still no clear new-entrant stampede — Two inflow weeks end the September redemption streak without a cab-driver stampede. IV firms off the floor; it does not max.

Horsemen Index — How bubbly are we? = I + II + III + IV (max 400). Equal-weight Lamont-hybrid; no fancy composite. Chart overall series plots Σ÷4 on the shared 0–100 axis beside the four dials. III′ (issuanceWithoutMegas) charts the non-mega track so SpaceX·Anthropic·OpenAI/≥$10B megas cannot fully hijack the main III dial. Editorial judgment—not a vendor index.

CONTEXT OVER TIME

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Toggle I–IV and the overall “How bubbly are we?” series (Σ÷4 on the shared 0–100 axis) to compare week ending 2026-10-03 against the full archive series.

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