S&P 500 (SPY) closes above … on July 24?

Platform comparison

Market context

The S&P 500 tracking ETF (SPY) will settle based on its closing price on 24 July 2026. The 0% implied probability across prediction-market platforms suggests either an extremely high strike price relative to consensus forecasts, or sparse liquidity in this particular contract. Cross-platform comparison reveals minimal divergence—sportsbooks do not price equity index movements, whilst analyst consensus on single-day index targets remains sparse. The absence of meaningful odds elsewhere reflects the inherent difficulty in forecasting intraday equity performance beyond broad directional bias.

Historical precedent shows that single-day S&P 500 movements rarely exceed 3–4% absent major systemic shocks or Federal Reserve announcements. The 0% probability reading likely indicates the strike price sits substantially above the 90th percentile of plausible closing levels for that date, making the contract function as a tail-risk instrument rather than a core directional bet. Previous July settlement windows have shown typical daily volatility clustering around 1–1.5%, with outlier moves concentrated around earnings seasons or macroeconomic data releases.

Traders monitoring this contract should track the Federal Reserve's policy calendar and any scheduled economic data for late July 2026, including potential employment reports or inflation prints. Geopolitical developments and corporate earnings surprises in the weeks preceding settlement could shift implied volatility. The settlement window closes at 20:00 UTC on 24 July, aligning with US market close; any after-hours price movements will not affect the contract outcome.

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 Best Prediction Markets, which mirrors the Polymarket order book directly.

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 Best Prediction Markets. 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.

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.