PolymarketClosedCheck availabilityNo KYCVerified resolution dataWell calibratedThis market resolved: Up
Resolved: Oct 21, 2026, 8:33 PM
Provider-verified resolution
CoinRithm has provider-backed winner and settlement-time evidence for this market.
Data quality warningStale data
Data as of Oct 21, 2026, 8:10 PM UTC · policy pm-quality-4
Trends
UpWon
DownLost
Related Markets
Related questions for context, not a comparison of equivalent contracts.
Rules
This market will resolve to "Up" if the open price for S&P 500 (SPY) on October 21, 2026 is higher than the closing price for SPY on the most recent prior trading day.
- This market will resolve to "Down" if the open price for S&P 500 (SPY) on October 21, 2026 is lower than the closing price for SPY on the most recent prior trading day.
- E.g., ordinarily, a market on Monday would refer to the previous Friday for its most recent closing price, unless that Friday were a market holiday, in which case it would refer to Thursday, or the next most recent trading day.
- If the two specified prices are exactly equal, this market will resolve 50-50.
- Prices will be used exactly as published by Pyth, without rounding.
- If S&P 500 (SPY) does not trade at all during the regular session, the market will resolve 50-50.