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 announced IPO timeline, yet Polymarket traders are pricing a 3% probability that the company will go public and close its first trading day within a specific share-price bracket by mid-2026. The conditional token structure on Polygon means traders holding YES tokens receive USDC payouts only if both an IPO occurs and the closing price lands in their selected range; a "No IPO before 2028" resolution wipes out all price-bracket positions. This binary dependency—IPO happening at all versus the specific valuation outcome—explains why even modest probability assignments to individual price brackets compress into a 3% aggregate YES across all brackets combined.
Historical precedent matters here. When private aerospace and defence firms have gone public, opening-day volatility has often exceeded 10–15%, with closing prices frequently settling well above or below IPO pricing depending on market conditions and investor appetite. SpaceX's last private valuation round in 2022 pegged the company at roughly $137 billion; if that anchors expectations, traders must account for both the time-value decay of that figure and the possibility that a 2025–2026 IPO environment could be materially different from today's. Comparable tech-heavy IPOs like Axiom Space's SPAC merger or Blue Origin's hypothetical public entry remain speculative reference points rather than direct comparables.
Recent reporting from Reuters and Bloomberg indicates SpaceX founder Elon Musk has made no formal IPO announcements, though he has stated the company would consider public markets once cash flow stabilises. Traders should monitor Starshield contract awards, Starlink revenue disclosures, and any regulatory filings as potential IPO signals. The settlement window ending June 2026 leaves roughly 18 months for an announcement, regulatory approval, and trading debut—a compressed timeline that partly explains the low probability assignment.
Methodology
We track SpaceX IPO: Closing Share Price on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
FAQ
- 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'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 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.
- 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.
Trade SpaceX IPO: Closing Share Price on Kalshi UK
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