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

Platform comparison

Market context

SPY is trading around the high-740s, so the key question is not whether the S&P 500 has had a strong year, but whether it can finish above the contract’s strike level by the close. Recent quotes put SPY at roughly $748 to $750, with an intraday range centred well above the lower strikes, while the market’s own pricing shows 100% for $720 and 99% for $730, implying the real debate only begins materially higher up the ladder.[1][2][5]

The historical frame is that SPY has already been close to record territory this year: Macrotrends shows an all-time closing high of $757.62 on 2 June 2026, and a 52-week high of $760.40.[6] That means a strike in the mid- to upper-700s would be a much tighter call than the near-certain lower strikes already reflected in the market. Against that backdrop, the current 0% YES crowd-implied probability on this contract looks like a sharp divergence from the listed index level, but the exact reading still depends on the unstated strike and whether the market is asking for a close above a level inside or above today’s trading band.[1][2][5]

For traders, the main catalysts are the afternoon cash close, any late-session re-pricing in large-cap megacaps, and macro headlines that can move the index in the final hour. With SPY trading close to recent highs, even a modest sell-off or rally into the bell can determine the outcome, so official market close prints matter more than the day’s midpoint; the comparison point is the spot ETF price around 748, not the year-to-date peak.[1][2]

Sources: 1 · 2 · 3 · 4 · 5

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 PolyGram. 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.

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.

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.