Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Scam?) Pick polygram.ink (preferred broker) |
61% | 39% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Place a position → |
Polymarket (direct) polymarket.com |
61% | 39% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Place a position → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Place a position → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Place a position → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Place a position → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| June 30, 2027 | 61% |
| December 31 | 43% |
| September 30 | 30% |
| July 15 | 19% |
| February 28 | 0% |
| March 31 | 0% |
Market context
The underlying real-world event is straightforward: Samuel Alito, aged 76, has shown no intention to retire from the Supreme Court before the end of 2026. On Polymarket, this contract prices at 0% YES, reflecting the market’s certainty that no official announcement of retirement will occur by the settlement deadline of 31 December 2026. The on-chain mechanics are clear—USDC settles the conditional tokens on Polygon, and the resolution hinges solely on an explicit statement from Alito himself, regardless of when the retirement would take effect.
Historically, Supreme Court justices in recent decades have retired between the ages of 78 and 85, with Stephen Breyer retiring at 83 and Anthony Kennedy at 82. Alito is still several years below that typical retirement window, and both he and Clarence Thomas have publicly indicated they intend to serve through at least 2026 and into 2027. Sources close to Alito confirm he is hiring clerks for the next term and plans to continue serving, making a 2026 retirement highly improbable [2][3].
Traders should monitor official announcements from Alito, the Supreme Court’s term schedule, and any White House pressure on aging justices to retire. Recent reporting from ABC News states Alito is not expected to leave the bench this year and intends to serve into 2027 [2]. Fox News and Jan Crawford of CBS News have also confirmed Alito does not plan to retire in 2026 [3]. No public indication of retirement has emerged from Alito or Thomas, and neither responded to Reuters inquiries about retirement intentions [4]. The settlement window closes at the end of 2026, so any announcement before that date would resolve the market to YES.
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
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
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Scam?. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- 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?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Scam? 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.
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