Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Kalshi UK Pick polygram.ink |
0% | 100% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Kalshi UK → |
Polymarket polymarket.com |
0% | 100% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on Kalshi UK → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on Kalshi UK → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on Kalshi UK → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on Kalshi UK → |
Live odds for Polymarket-based markets come from the Polygon order book. Non-Polymarket venues show attributes only; clicking any row opens the market on Kalshi UK.
Active sub-markets
Market context
SpaceX remains privately held with no confirmed IPO timeline, yet Polymarket currently prices this contract at 0% YES, reflecting the substantial uncertainty around whether the company will go public before the December 2027 deadline and, if it does, at what valuation. The market settles on the first-day high share price hitting a specific threshold—a metric that depends entirely on underwriter pricing, market conditions at launch, and opening-day volatility. With settlement windows extending into mid-2026, traders are effectively betting on both the occurrence of an IPO and the price action within its opening session.
Historical precedent offers limited direct comparison. SpaceX's valuation has grown from $1 billion in 2012 to over $180 billion in recent private fundraising rounds, yet comparable aerospace and defence IPOs show wide variance in first-day performance. Blue Origin remains private under Amazon ownership, whilst Virgin Galactic's 2019 SPAC merger opened at $10.50 and closed at $12.29, gaining 17% on day one. Relatedly, Axiom Space and other space-sector companies have pursued alternative listing routes rather than traditional IPOs, suggesting founder preference for capital structures that maintain control.
The primary catalyst remains Elon Musk's public statements and SpaceX's capital requirements. Recent regulatory approvals for Starship testing and Starlink's potential standalone IPO filing could influence timing. Reuters reported in 2023 that SpaceX was exploring options to return capital to shareholders, though no formal IPO announcement has materialised. Traders should monitor quarterly funding announcements, debt issuances, and any SEC filings that might signal imminent public market entry.
Methodology
This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
FAQ
- Where can I trade this market with the lowest fees?
- On Kalshi UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- Is this market available outside the US?
- Kalshi UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- Do I need to KYC for this market?
- Not under $1,500 of lifetime trading volume. Above that threshold, Kalshi UK triggers a quick verification flow that finishes in minutes.
- How reliable are the quoted odds?
- The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
Trade SpaceX IPO: First Day Share Price Hits 2026? on Kalshi UK
Live order book, 0% fees, USDC settlement in seconds.
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