Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 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 → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| $750 | 100% |
| $745 | 100% |
| $740 | 100% |
| $735 | 100% |
| $730 | 100% |
| $780 | 0% |
| $775 | 0% |
| $770 | 0% |
| $765 | 0% |
| $760 | 0% |
| $755 | 0% |
Market context
The SPDR S&P 500 ETF (SPY) is currently trading at $754.81 as of the close on 16 July 2026, meaning any contract requiring it to close above a level higher than this is effectively impossible to settle favourably today. On Polymarket, this reality is reflected in the 0% crowd-implied probability for the YES outcome, as the market prices the conditional token as worthless given the settlement window has already closed at 20:00 UTC. Traders interacting with the USDC pool on Polygon see no liquidity interest, since the underlying asset has already finished its daily session below any plausible high threshold implied by a non-zero probability.
Historically, SPY has rarely closed significantly above its intraday peak without a major earnings surprise or macro shock, and its all-time closing high of $757.62 on 2 June 2026 remains the only recent benchmark above current levels [7]. With the 52-week high at $760.40 and the current price sitting just $2.81 below that peak, the market has already absorbed the upside potential for this date, leaving no room for a late-day breakout that would alter the outcome.
Key catalysts that would have influenced this result—such as the Federal Reserve’s interest rate decision or Q2 earnings from major index constituents—were all released earlier in the week, with no new announcements scheduled for 16 July [3]. The absence of fresh data, combined with the ETF’s tight range between $751.88 and $754.81 throughout the day, confirms that the 0% probability is not a pricing error but a reflection of settled market conditions.
Methodology
We track S&P 500 (SPY) closes above … on July 16? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.
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 Kalshi UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- 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.
Trade S&P 500 (SPY) closes above … on July 16? on Kalshi UK
Live order book, 0% fees, USDC settlement in seconds.
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