S&P 500 (SPY) closes above … on July 22?

Platform comparison

Market context

The real-world event is whether the SPDR S&P 500 ETF Trust, or SPY, finishes **above the market’s specified level** when trading closes on 22 July. In this kind of contract, a **YES** share pays out if the closing price is above that threshold, while a **NO** share pays out if it is at or below it; with the crowd-implied probability at 0%, the market is effectively pricing the outcome as extremely unlikely. SPY was around 738.09 to 738.60 on 23 July 2026, after a previous close of 747.41, which gives a rough reference point for how far the ETF was from the settlement date immediately after expiry.[1][2]

For context, these markets are usually read through the lens of the ETF’s closing level on the specified date, not intraday moves or broader commentary. SPY tends to move with the S&P 500 and, because it is an exchange-traded fund, the key issue is the official market close rather than where it traded during the session. When a contract is priced near 0%, traders are usually saying the threshold sits well above the range they expect by expiry, though the exact strike level is what ultimately matters. Recent SPY pricing around the high-700s would only support a positive outcome if the contract’s barrier were set below that area.[1][2]

Catalysts to watch are the usual market-moving events between now and settlement: US inflation releases, Federal Reserve communications, labour data, earnings from the largest index constituents, and any sharp shift in rates or risk sentiment. Because the event is tied to a specific close, the most relevant dependency is the trading session itself, including any late-day rally or sell-off after scheduled announcements. SPY’s live price can be checked against the closing print on the day, but the market will settle strictly on the published close rather than on after-hours trading.[1][2]

Sources: 1 · 2

Methodology

We track S&P 500 (SPY) closes above … on July 22? 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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 Prediction Market UK. 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.

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 Market 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.