Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Kalshi UK Pick polygram.ink |
4% | 96% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Kalshi UK → |
Polymarket polymarket.com |
4% | 96% | 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
| $1.0T-$1.5T | 4% YES | 96% NO |
| $3.0T-$3.5T | 18% YES | 82% NO |
| $3.5T+ | 21% YES | 79% NO |
| <$1.0T | 1% YES | 99% NO |
| $2.5T-$3.0T | 27% YES | 73% NO |
| $2.0T-$2.5T | 18% YES | 83% NO |
Market context
SpaceX's path to public markets remains one of the most anticipated corporate events in aerospace and venture capital. The company, valued at approximately $180 billion in its most recent private funding round (October 2024), has never filed for an IPO, and Elon Musk has historically resisted taking the company public, citing long-term mission focus over quarterly earnings pressure. Polymarket currently prices the YES outcome—that SpaceX will close its IPO month with a specific market capitalisation threshold—at 3%, reflecting the substantial uncertainty around both the timing and valuation of any eventual listing. The conditional token structure on Polygon means traders are effectively betting on two correlated events: an IPO occurring by end-2027, and the closing price landing within a defined range on the final trading day of that month.
Historical precedent offers limited direct comparison. Blue Origin remains private despite decades of operations; Relativity Space and Axiom Space, both space-sector companies, have pursued SPAC mergers rather than traditional IPOs. Traditional aerospace firms like Lockheed Martin and Northrop Grumman went public decades ago at vastly different technological and regulatory stages. The 3% probability suggests the market views a near-term IPO as unlikely, though SpaceX's capital requirements for Starship development and Mars ambitions could eventually necessitate public markets access.
Catalysts include any formal SEC filing, statements from Musk or SpaceX leadership regarding public markets, major government contracts affecting valuation, or shifts in venture funding availability. Recent reports (late 2024) indicate SpaceX continues raising at private valuations, suggesting no imminent IPO timeline. Regulatory changes affecting space commerce or defence procurement could alter the calculus for going public.
Methodology
This page reviews SpaceX Closing Market Cap End of IPO Month across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Kalshi UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.
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.
- 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.
- What's the difference between YES and NO shares?
- A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
- 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 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.
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