S&P 500 (SPX) Up or Down on June 24?

Platform comparison

Market context

The underlying event is whether the S&P 500 closes higher on Wednesday, 24 June 2026 than it did on the prior trading day, Tuesday 23 June. With the market at 7,366.51 on Tuesday and 7,386.54 on Wednesday, the index has already moved up by roughly 21 points, yet the crowd-implied probability of an “Up” resolution sits at 0%, suggesting a stark divergence between live price action and prediction-market sentiment.

Historically, single-day reversals following sharp pullbacks are common in mid-year trading windows. The biggest sell-off of 2026 occurred on 5 June, when the index dipped toward 7,313 before rebounding; similar technical bounces have often preceded further consolidation rather than sustained rallies. In comparable cases, such as the June 2022 and June 2023 periods, one-day gains following multi-week declines were frequently followed by sideways or downward moves, framing why traders may be pricing in a high chance of a “Down” outcome despite the current uptick.

Key catalysts include the Federal Reserve’s upcoming policy statement and the release of Q2 GDP data, both scheduled within the next week, which could trigger volatility. Recent analysis from CNBC notes that the S&P 500 hit turbulence on 23 June, with intraday lows near 7,336, reinforcing concerns about a potential top forming. Traders should monitor whether the index holds above the 7,313 Fibonacci support level, as a breach could signal renewed downward pressure ahead of the settlement window.

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Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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

Where can I trade this market with the lowest fees?

On Best Prediction Markets, 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?

Best Prediction Markets 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.

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 it cost to trade on Best Prediction Markets?

Zero. Best Prediction Markets routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.