Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win 2026) Pick polygram.ink (preferred broker) |
63% | 37% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
63% | 37% | 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 | 63% |
| December 31 | 44% |
| September 30 | 32% |
| July 15 | 30% |
| February 28 | 0% |
| March 31 | 0% |
Market context
Samuel Alito, the 76-year-old Associate Justice, has given no public indication of retiring and is actively hiring clerks for the next term, confirming he intends to serve into at least 2027. The market’s crowd-implied probability of 0% for a retirement announcement by the end of 2026 reflects this consensus, positioning Alito as the favourite to stay. While historical precedents show justices often retire near age 80, recent exits like Breyer and Anthony Kennedy occurred earlier, yet Alito remains years below that threshold, making the underdog case of an immediate announcement appear valueless at current prices.
Traders should monitor official announcements from Alito and the Supreme Court’s term schedule, as any retirement declaration would likely coincide with the end of the current term or be immediate. Recent reporting from ABC News and CBS News confirms that sources close to Alito state he does not plan to retire this year, reinforcing the 0% probability. With President Trump supporting Alito’s continued tenure and no public pressure evident, the contrarian angle of an unexpected announcement lacks catalyst support, leaving the consensus firmly aligned with Alito’s continued service. The settlement window ending in 2026 offers no near-term value spots for a retirement bet.
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win 2026, which mirrors the Polymarket order book directly.
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?
- 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 Who Will Win 2026 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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