Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Review UK) Pick polygram.ink (preferred broker) |
61% | 39% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
61% | 39% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
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
Samuel Alito, aged 76, has given no public indication of planning to retire from the Supreme Court, with credible sources confirming he intends to serve into at least 2027. This real-world certainty underpins the current 0% crowd-implied probability that he will announce his retirement by the end of 2026. For a power-user evaluating conditional order tools, this market functions as a low-volatility instrument where programmatic entry is unnecessary; the underlying event is so clearly defined that automated copy-trading bots would simply mirror the consensus without seeking alpha.
Historically, Supreme Court justices have typically retired in their mid-to-late 70s, with recent departures like Stephen Breyer (83) and Anthony Kennedy (85) occurring well past Alito’s current age. David Lat’s analysis notes that Alito is still years away from the typical retirement age for SCOTUS members, reinforcing the 0% probability as factually grounded rather than speculative. Comparable cases show that hiring clerks for the next term is a strong signal of continued service, a pattern Alito has followed, making an immediate announcement highly improbable.
Traders should monitor official announcements from Alito and the Supreme Court’s term schedule, as these are the only resolution sources for this market. Recent reporting from ABC News confirms Alito is hiring clerks for the next term and intends to continue serving, a dependency that effectively rules out a 2026 retirement announcement. No other catalysts, such as political pressure or health concerns, have been substantiated by public records, meaning the market will likely remain at 0% until an explicit, verified statement from Alito himself emerges.
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 Polymarket Review UK, 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.
- 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 Review UK 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 Will Samuel Alito announce his retirement by 2026? on Polymarket Review UK
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