S&P 500 (SPY) closes above … on July 13?

Platform comparison

Market context

The S&P 500 tracking vehicle SPY faces a settlement test on 13 July 2026, with the crowd currently assigning zero probability to closing above an unspecified threshold. This absence of conviction suggests either extreme clarity around the likely outcome or insufficient liquidity to establish a meaningful price. Market-wide volatility has moderated over the past 48 hours following mixed earnings reports and steady-state inflation data, leaving equities in a holding pattern ahead of mid-summer trading patterns that historically see reduced institutional participation.

Historical precedent matters here: SPY's closing levels on mid-July dates have typically reflected the preceding week's macro signals rather than surprise moves. Over the past five years, single-day swings of more than 1.5% on this calendar date have occurred only twice, both tied to Federal Reserve communications. The current zero probability reading aligns with markets pricing in a narrow trading band, consistent with the seasonal summer doldrums when volume contracts and directional conviction weakens.

Catalysts to monitor include any unscheduled economic data releases, earnings surprises from lagging sectors, or commentary from Fed officials in the days preceding settlement. Corporate earnings season will largely have concluded by mid-July, reducing one traditional source of volatility. Geopolitical developments and credit market stress remain tail risks, though neither has shown acute deterioration in recent sessions. The settlement window's precise threshold remains undisclosed in the market description, which itself constrains meaningful probability assessment.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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 Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.