S&P 500 (SPX) Up or Down on July 2?

Platform comparison

Market context

The S&P 500 closed higher on Thursday, 2 July 2026 than on the most recent prior trading day, a fact that has driven the crowd-implied probability to 100% YES for this prediction market. On that date, the index settled at 7,524.59, up from 7,483.24 on Wednesday, 1 July, marking a clear daily gain[1][3]. This outcome is consistent with the broader upward trend seen in June and early July, where the index rose from 7,473.85 on 1 June to over 7,500 by late June[1].

Historically, such single-day gains in early July are not uncommon, particularly when the prior day is not a holiday and market sentiment remains positive. The 0.55% increase on 2 July aligns with typical volatility patterns for the period, as seen in similar gains during the same timeframe in previous years[1][4]. Traders should note that the market’s certainty reflects both the confirmed close and the absence of any negative catalysts that might have reversed the trend.

Key catalysts to monitor include the Federal Reserve’s upcoming policy announcements and the release of Q2 GDP data, which could influence future index movements. Recent reports from MarketWatch highlight ongoing concerns about technology sector valuations and trade policy shifts, which may affect SPX performance in the coming weeks[2]. On-chain, the contract resolves via conditional tokens on Polygon, with settlements in USDC, ensuring transparent and automated execution for Polymarket users.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track S&P 500 (SPX) Up or Down on July 2? 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

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 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.