Pronóstico: S&P 500 (SPX) Up or Down on June 25?

Platform comparison

Market context

The official S&P 500 closing price on Thursday, 25 June 2026, will be compared against the most recent prior trading day’s close to determine if the index moved up or down. On Polymarket today, this contract is priced with a 0% probability for "Up", implying the crowd is virtually certain the index will finish lower. This extreme positioning mirrors the market behaviour seen on 25 June 2026 itself, when the S&P 500 ended flat at 7,354.02 while the Nasdaq slipped 0.24% amid tech weakness [7]. Historical precedents show that when major indices hover near record highs with mixed earnings signals—such as Micron’s strong results failing to revive broader momentum—the market often drifts sideways or down, reinforcing the crowd’s bearish consensus [3][4].

Traders should monitor the Federal Reserve’s inflation outlook, as the Personal Expenditure Price Index rose 0.4% in May, pushing annual inflation to 4.1% well above the 2% target [4]. This data point, combined with anticipated interest rate hikes, has already pressured risk assets and contributed to outflows from cryptocurrency ETFs [5]. Additionally, watch for any shifts in AI expenditure concerns, which recently triggered a downturn in tech shares and indirectly impacted related markets [3]. The on-chain mechanics of this market rely on USDC settled on Polygon, using conditional tokens to resolve outcomes based on Binance SPX/USDT 1-minute candle closes at noon ET [2]. With the settlement window ending 20:00 UTC on 25 June 2026, the current 0% "Up" price reflects a high-confidence view that macro pressures will outweigh any short-term gains.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

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?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

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?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.