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

Platform comparison

Market context

The S&P 500 closed lower on Wednesday, 24 June 2026, at 7,342.50, down 22.96 points from the prior day’s close of 7,365.46, confirming a single-day decline that resolves this prediction market as “Down”[1][4]. On Polymarket, this contract currently prices at 0% for “Up”, reflecting the on-chain reality that the index fell rather than rose, with USDC settlements already locked on the Polygon network via conditional tokens[1][7].

Historically, single-day drops in late June often follow earnings volatility or macro data surprises, as seen in 2023 when the index fell 0.8% ahead of Fed commentary, and in 2025 when Micron’s weak guidance triggered a 0.5% decline[1][7]. These precedents frame the current 0% probability not as an anomaly but as a consistent outcome of late-quarter sensitivity to corporate earnings and policy signals.

Traders should monitor upcoming earnings releases, particularly from tech firms like Micron, whose results are scheduled for this week and have already influenced market sentiment[7]. The Federal Reserve’s June meeting minutes, released later this month, may also shape near-term direction, as past minutes have correlated with 0.3–0.6% index swings[1][7]. With the settlement window ending 20:00 UTC on 24 June, the on-chain outcome is already determined by the closing price differential.

Sources: 1 · 2 · 3 · 4 · 5

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

Is this market available outside the US?

Kalshi UK 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 Kalshi UK?

Zero. Kalshi UK 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.

Do I need to KYC for this market?

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