Pronóstico: S&P 500 (SPX) Up or Down on July 1?

Platform comparison

Market context

The S&P 500 closes higher on Wednesday, 1 July 2026 than it did on the most recent prior trading day, or it closes lower. This single-day directional bet is priced at 51% for “Up” on Polymarket today, reflecting a near-even split among traders. The contract settles on-chain via conditional tokens on Polygon, with USDC (the stablecoin used for trading) backing all positions.

Historically, July 1 has often been a quiet day for the index, with small moves compared to month-end volatility. In June 2026, the S&P 500 closed at 7,499.36 on 30 June, then opened at 7,478.84 on 1 July, dipping slightly before recovering to 7,521.11 by midday [2][4]. Similar patterns in 2025 and early 2026 show that single-day swings of under 0.5% are common, making the 51% probability a cautious lean rather than a strong conviction.

Traders should watch the Federal Reserve’s upcoming policy statement and any surprises in the US jobs report, which could trigger intraday volatility. The June employment data, released earlier this week, showed resilient hiring but soft wage growth, a mix that has kept equity markets range-bound [3]. With the settlement window ending at 20:00 UTC on 1 July, any late-day news could shift the final close decisively.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: S&P 500 (SPX) Up or Down on July 1? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Argentina, which mirrors the Polymarket order book at 0% fees.

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 Polymarket Argentina. 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'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.