Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Kalshi UK Pick polygram.ink |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Kalshi UK → |
Polymarket polymarket.com |
100% | 0% | 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 despite being valued at approximately $180 billion in secondary markets, making it one of the world's most valuable unlisted companies. An initial public offering would represent a watershed moment for the commercial space sector, potentially unlocking liquidity for early investors and employees whilst signalling confidence in sustained profitability across launch services, satellite internet, and government contracts. The 99% crowd probability on Polymarket reflects near-certainty that an IPO will occur before the December 2027 deadline, with traders pricing conditional tokens on USDC-denominated brackets representing the opening share price across multiple ranges.
Historical precedent offers limited direct comparison. Blue Origin remains private despite similar scale; Axiom Space and Relativity Space pursued SPAC routes rather than traditional IPOs. Rocket Lab's 2021 SPAC merger at $560 million valuation, followed by subsequent trading between $3 and $8 per share, demonstrates how space-sector IPOs can experience volatility and repricing. Axiom's 2023 SPAC deal valued it at $2.16 billion. These precedents suggest opening valuations for SpaceX could span a wide range depending on market conditions and the company's chosen structure.
Traders monitoring this contract should track Elon Musk's public statements regarding IPO timing, SEC regulatory developments affecting space companies, and SpaceX's quarterly revenue disclosures through government contracts. Recent filings with the FAA regarding Starship operations and Starlink's satellite deployment schedules provide indirect signals about operational maturity. Macroeconomic conditions, particularly technology sector sentiment and interest rates, will materially influence both the decision to proceed and the opening valuation. Any announcement of an IPO filing would likely trigger significant repricing across the conditional token brackets on Polygon.
Methodology
Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
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.
- What does it cost to trade on Kalshi UK?
- Zero. Kalshi UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.
- How fast are USDC deposits?
- Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within 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: Opening Share Price on Kalshi UK
Live order book, 0% fees, USDC settlement in seconds.
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