8% — Will JPMorgan Chase serve as lead-left underwriter on OpenAI's IPO
Kalshi 8% · 3 contracts · $500 volume · medium confidence
Updated 2026-09-21 23:35:00 UTC

Why this matters:
This contract estimates a 24% probability that JPMorgan Chase will be selected as the lead-left underwriter for OpenAI's initial public offering. The lead-left underwriter role is a prestigious position in IPO syndicates, typically awarded to one of the major investment banks based on relationships, track record, and negotiated terms. JPMorgan's probability reflects its status as a top-tier bank, though it trails Goldman Sachs (66¢) significantly in market expectations. The gap between JPMorgan and Goldman likely reflects Goldman's historical dominance in tech IPOs and any reported preferences OpenAI may have signaled. Resolution depends on OpenAI's formal IPO filing and syndicate announcement, which typically occurs when the company officially registers with the SEC. Trading volume on JPMorgan's contract ($418 in 24 hours) suggests moderate market interest relative to the Goldman contract's lower volume, possibly indicating lower confidence in JPMorgan's chances among active traders.

Key factors:
- Goldman Sachs is priced at 66¢, commanding a substantial 42-percentage-point lead over JPMorgan, indicating market consensus favors Goldman for lead-left role
- JPMorgan's 24¢ price sits between Morgan Stanley (20¢) and Citigroup (4¢), positioning it as the second-most-likely among remaining banks
- No publicly announced OpenAI IPO filing or syndicate commitment has been disclosed, meaning resolution depends on a future formal announcement from OpenAI or its underwriters
- JPMorgan's historical relationships with OpenAI (financing, advisory roles) versus Goldman's track record in similar tech-sector IPOs will influence the actual selection
- The contract's $418 daily volume on JPMorgan versus $65 on Goldman suggests fewer traders are actively hedging JPMorgan's outcome, potentially indicating lower conviction in the alternatives

Contracts:
- Will Morgan Stanley serve as lead-left underwriter on OpenAI's IPO?: Morgan Stanley — 14¢ Kalshi $500 (weight 100%)
- Will Goldman Sachs serve as lead-left underwriter on OpenAI's IPO?: Goldman Sachs — 5¢ Kalshi $0 (weight 0%)
- Will Citigroup serve as lead-left underwriter on OpenAI's IPO?: Citigroup — 4¢ Kalshi $0 (weight 0%)

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## Methodology

SimpleFunctions aggregates live YES-side prices from Kalshi and Polymarket contracts bound to this question. For binary topics the headline is the liquidity-weighted mid-price (weight = log(1 + 24h volume) × freshness, where freshness is 1.0 if updated <24h, 0.7 if <7d, 0.4 otherwise). For multi-outcome (winner-take-all) topics the headline is the current leader's price — disjoint outcomes are never arithmetically averaged. Snapshots refresh every 5 minutes during market hours.

## SF Signal

- SF Index, regime, and 30d Brier calibration are computed separately and surfaced at https://simplefunctions.dev/admin/calibration.
- No SimpleFunctions index / regime / calibration signal is bound to this topic yet — the headline above is market-derived only.

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*Last verified: 2026-09-21T23:20:53.432Z*

By SimpleFunctions — https://simplefunctions.dev/

Cite as: "8% per prediction markets (SimpleFunctions, September 2026)"
Canonical: https://simplefunctions.dev/answer/openaileadleft
Full data: https://simplefunctions.dev/api/public/query?q=Will%20JPMorgan%20Chase%20serve%20as%20lead-left%20underwriter%20on%20OpenAI's%20IPO
Provider: SimpleFunctions — https://simplefunctions.dev