Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) Pick polygram.ink (preferred broker) |
54% | 46% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
54% | 46% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Market context
SPY has been drifting higher intraday today, with quotes around the high-740s after a prior close in the high-730s to low-740s range, so the immediate tape is already leaning in the direction that would satisfy an “Up” finish if the session holds its gains. The key change over the last 24-48 hours is not a fresh shock but the market’s continued ability to sit near the top end of its 52-week range, which keeps the daily comparison line elevated and makes even a modest sell-off enough to flip the result.[1][2][4][6]
That is the main context for reading a 67% crowd-implied “YES”: SPY has recently been trading close to record territory, and when an index ETF is this extended, the daily direction often hinges more on late-session profit-taking than on broad trend. Historical framing from the supplied price data shows SPY has repeatedly made and retraced multi-point moves around fresh highs, with the current price still well above its 52-week low and near its upper band, so the market is effectively pricing a continuation day rather than a breakout from a depressed base.[2][5][9]
For the rest of the session, traders will be watching whether buying into the close persists and whether any late macro headlines change risk appetite, because the settlement uses the closing print versus the previous trading day’s close. The supplied quotes already show the ETF moving around the 746-750 area, so the immediate dependency is simple: a steady finish keeps “Up” in play, while a late fade back below the prior close would hand the result to “Down”.[2][4][6][7]
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 Prediction Today, 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.
- What does Polymarket cost to trade?
- Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
Trade SPY (SPY) Up or Down on July 22? on Prediction Today
Live order book, 0% fees, USDC settlement in seconds.
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