60%yes · live odds
Do not citeUnder-measured: 1 of 6 pillarsMeasurement certainty Low
Odds via Polymarket public API. Verdict is an experimental market-quality diagnostic, not advice.
+5.5 pts 24h

Part of a mutually exclusive multi-outcome group (Polymarket neg-risk)

Part of event: Largest IPO by market cap in 2026? · largest-ipo-by-market-cap-in-2026-287

Market structure and 24h change as reported by Polymarket's public API.

Top of book

Best bid

0.590

Best ask

0.610

Spread

3.3% of mid

2.00 pts

As reported by Polymarket's public API at 08:25 UTC; top of book, not full depth; per-side depth not shown. The spread is shown against the midpoint of the two quotes above, which is arithmetic on the venue's figures, not a figure the venue reports.

Volume

24h volume

$14,038

Total volume

$783,198

Volume as reported by Polymarket's public API.

Resolution rules

Rules as stated by Polymarket, reproduced verbatim. Convexly has not independently reviewed them and does not endorse them; the rating's resolution-reliability pillar treats rule text as present but not independently reviewed.

This market will resolve to the company that achieves the highest market capitalization in U.S. dollars based on the official closing price on its first trading day in 2026. This market will resolve to a company that completes an Initial Public Offering (IPO) between January 1 and December 31, 2026, 11:59 PM ET. Market capitalization is defined as the total number of outstanding shares multiplied by the closing share price on the first trading day. If two or more companies have exactly equal highest closing market capitalizations, this market will resolve to the company whose listed name comes first alphabetically. Resolution will be based on the primary exchange’s official listing page. In the event that the relevant figure is not displayed, another reliable source will be used. In case the respective company's primary exchange’s official listing page does not report in U.S. dollars, it will be converted to U.S. dollars using the U.S. Federal Reserve Board’s H.10 foreign exchange reference rate for the relevant currency pair on the company’s first trading day (https://www.federalreserve.gov/releases/h10/). If no such rate is available for the relevant trading day, the most recent previously published rate will be used. If the relevant currency is not listed, another credible exchange rate source will be used. A listed company may resolve to "No" as soon as it becomes unable to complete an IPO, including due to acquisition, merger, or absorption by an entity that is already publicly traded. In the event of an interruption in the course of the normal trading session on the respective companies’ first day of trading (e.g., a circuit breaker or half-day), the market will resolve according to the official closing price of the abbreviated session. If no such official closing price is published, the market will resolve according to the next trading day on which an official closing price is published, treating that as the first day of trading for purposes of this market.Show the full rules text

This market will resolve to the company that achieves the highest market capitalization in U.S. dollars based on the official closing price on its first trading day in 2026. This market will resolve to a company that completes an Initial Public Offering (IPO) between January 1 and December 31, 2026, 11:59 PM ET. Market capitalization is defined as the total number of outstanding shares multiplied by the closing share price on the first trading day. If two or more companies have exactly equal highest closing market capitalizations, this market will resolve to the company whose listed name comes first alphabetically. Resolution will be based on the primary exchange’s official listing page. In the event that the relevant figure is not displayed, another reliable source will be used. In case the respective company's primary exchange’s official listing page does not report in U.S. dollars, it will be converted to U.S. dollars using the U.S. Federal Reserve Board’s H.10 foreign exchange reference rate for the relevant currency pair on the company’s first trading day (https://www.federalreserve.gov/releases/h10/). If no such rate is available for the relevant trading day, the most recent previously published rate will be used. If the relevant currency is not listed, another credible exchange rate source will be used. A listed company may resolve to "No" as soon as it becomes unable to complete an IPO, including due to acquisition, merger, or absorption by an entity that is already publicly traded. In the event of an interruption in the course of the normal trading session on the respective companies’ first day of trading (e.g., a circuit breaker or half-day), the market will resolve according to the official closing price of the abbreviated session. If no such official closing price is published, the market will resolve according to the next trading day on which an official closing price is published, treating that as the first day of trading for purposes of this market.

Resolution mechanics

Resolution parameters as stated by Polymarket.

Resolved by (UMA adapter)
0x2F5e3684cb1F318ec51b00Edba38d79Ac2c0aA9d
Proposer bond
$500 proposer bond
Proposer reward
$5 proposer reward

Market Trust diagnostic · v0.2 candidate

Will SpaceX have the highest IPO Market Cap 2026?

This market is not in the v0.1 daily card set yet. The v0.2 diagnostic scorecard below shows the per-pillar contribution from the latest materializer run, with visible caveats and evidence-status separation.

Why this rating

Why this rating

Composite 57 · Do not cite

Measurement certainty

Low

1 measured · 3 modeled · 2 not assessed

Certainty reflects how much of this market we measured, not how good the market is.

  • CoherenceModeled estimatefixed rules, not a per-market measurementweight 25.0

    No full-provenance CME signal is linked to this condition in the current ledger window; absence of a signal is not proof of coherence.

    • · no linked cme signal in window
    • · absence of signal not proof of coherence
    • · cme signal window days: 7
    • · recent full provenance signals: 22
    50+17.9
  • ExecutabilityModeled estimatefixed rules, not a per-market measurementweight 20.0

    Executability scored as worse-of(spread, depth) from a single orderbook snapshot; the two were merged from the former liquidity + depth pillars to stop double-counting one correlated source.

    • · executability worse of spread depth
    • · spread: top-of-book spread 3.0c
    • · spread: pp-band-to-cents-band approximation in effect (depth_5pct_usd/2 per side); per-side decomposition pending substrate work
    • · spread: scorer_version:M2
    45+12.9
  • Resolution reliabilityModeled estimatefixed rules, not a per-market measurementweight 20.0

    Resolution source and rule text are present but not independently reviewed.

    • · resolution metadata present manual review pending
    70+20.0
  • Participant flowNot assessednot yet measured for this marketweight 20.0

    No participant flow rollup materialized yet.

    • · participant flow pending
    not assessednot assessed
  • Integrity-risk screenNot assessednot yet measured for this marketweight 10.0

    No participant concentration rollup materialized yet.

    • · missing input
    not assessednot assessed
  • Audit completenessMeasuredweight 5.0

    3 linked artifacts; 1 missing hashes; 0 stale/failing sources.

    • · artifact hash missing
    • · source watermarks healthy
    85+6.1

How it adds up: composite = Σ(score × weight) / Σ(weight) across measured + heuristic pillars only. Pending and data-rights-blocked pillars are excluded from both numerator and denominator. Total contributing weight = 70.0.

Caveat: 2 pillars not assessed yet; the score will recompute as the substrate fills in.

Structural coherence read

The Coherent Markets Engine checks this market's pricing for structural inconsistencies against related markets. Whether a current signal exists, and its construction, is included with Researcher.

See Researcher

Market opened 2026-02-02 · minimum order size 5 shares · price tick size 0.010 · as stated by Polymarket.