S&P 500 (SPY) closes above … on July 23?

Platform comparison

Market context

The event is whether **SPY closes above the market’s stated threshold at the end of the trading session**, which is the settlement point for this contract. In prediction markets, a **YES** share pays out if that exact condition is met, while a **NO** share pays if it is not, so the price is a live snapshot of how likely traders think the close will be.

A **0% YES** probability means the market is treating an above-threshold close as effectively impossible at the moment, not that the index cannot move again before the close. SPY has been trading near the top end of its range this year, with a recent last close of **732.97** on 24 June and an all-time closing high of **757.62** on 2 June, so the broader context is one of elevated prices rather than a thinly traded edge case.[3] At the same time, SPY was quoted around **742.57** earlier on 23 July, showing that the fund can still move materially within a session.[2]

For traders, the main catalysts are the usual late-session drivers: US economic releases, Federal Reserve communication, and any sharp move in mega-cap equities that dominate the S&P 500. Because SPY tracks the S&P 500, the final auction matters as much as the headline index trend; even a strong intraday rally may not translate into a higher settlement if selling appears late in the day. CNBC’s live quote page and other market data feeds are the quickest way to check whether SPY is holding near the relevant level as the close approaches.[1]

Sources: 1 · 2 · 3

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 Market UK, 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

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.

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.

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.