Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Qué Es) Pick polygram.ink (preferred broker) |
35% | 65% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
35% | 65% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| June 30, 2027 | 35% |
| December 31 | 6% |
| September 30 | 1% |
| July 15 | 0% |
| February 28 | 0% |
| March 31 | 0% |
Market context
Samuel Alito, the Supreme Court's most senior conservative justice at 74 years old, has not signalled any intention to step down from the bench. The conditional token market on Polymarket currently prices a YES resolution at roughly 2 cents per share, implying traders assess a 2% probability he announces retirement by end of 2026. This valuation reflects the baseline assumption that justices serve until death or voluntary departure, with Alito having shown no public indication of either path in the near term.
Historical precedent suggests retirement announcements from sitting justices cluster around specific moments: health crises, shifts in Senate control that affect replacement prospects, or strategic windows when a justice's preferred party controls the presidency. David Souter's 2009 announcement came amid a Democratic administration; Anthony Kennedy's 2018 retirement coincided with Republican control of both chambers. Alito authored the Dobbs decision overturning Roe v. Wade in June 2022, cementing his influence on the Court's ideological direction. At 74, he remains younger than Clarence Thomas (76) and significantly younger than Sonia Sotomayor (74) or Elena Kagan (64), suggesting no immediate health-related pressure.
Traders monitoring this contract should track Republican electoral performance in 2024 and 2026 midterms, as Alito would have strongest incentive to retire if his party controls the presidency during a replacement window. Any public health developments or statements from Alito himself would move the USDC-settled conditional tokens sharply. The contract's extended settlement date to December 2026 captures two full years of political uncertainty, though the current 2% pricing suggests the market views a retirement announcement as a low-probability tail event within this timeframe.
Methodology
Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.
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
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- 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.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Qué Es trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
- 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 Pronóstico: Will Samuel Alito announce his retiremen… on Polymarket Qué Es
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