S&P 500 (SPX) Up or Down on August 7?

Platform comparison

Market context

The S&P 500 needs to finish **higher than the previous trading day’s close** to pay out **Up**, and the market is pricing that at a **95% YES** probability, so the favourite is overwhelming. That leaves only a thin underdog case: a late reversal, a sharp post-data sell-off, or a holiday-like gap lower would have to beat a market that has otherwise been trading near the top of its recent range. Recent closes show some softness into the event, with the index finishing at 7,503.85 on 7 August and 7,482.71 on 8 July, while the five-day performance remained slightly negative, suggesting the consensus is for a modestly higher or at least stable close rather than a meaningful break lower.[3][5][11]

For handicapper framing, the value question is not whether **Up** is the favourite, but whether 95% overstates it given the day’s event risk. Comparable sessions with major macro releases can generate one-directional moves that briefly overpower the broader trend, and the S&P’s recent slip from its early-August highs shows room for disappointment if the data miss expectations.[4][10] The main catalyst is the **July nonfarm payrolls report and unemployment rate**, scheduled before the open on Friday, which is the kind of release that can reset rate-cut expectations and shift equity futures quickly.[9][13] Consensus therefore sits firmly with **Up**, while the only clear contrarian angle is a data shock or risk-off repricing that leaves the index below the prior close by the finish.[1][2]

Sources: 1 · 2 · 3 · 4 · 5

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 Who Will Win 2026, 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 Who Will Win 2026. 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.

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.