Current implied probability
Down 100%+72.5pt
Market quality
52 / 100
Medium quality24h Volume
$10.5K
Liquidity
$9.3K
Medium liquidityBid / Ask
- / 0.1%
Comments
0
Market data
Updated 10 minutes ago
Sep 9, 26, 12:01 PM UTCSep 10, 26, 8:00 PM UTC
Trends
100%
0%
Related Markets
Related questions for context, not a comparison of equivalent contracts.
S&P 500 (SPX) Opens Up or Down on September 11?
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Manifold MarketsRules
This market will resolve to "Up" if the official S&P 500 Index open price for S&P 500 (SPX) on September 10 is higher than the official S&P 500 Index closing price for SPX on the most recent prior trading day.
- This market will resolve to "Down" if the official S&P 500 Index open price for S&P 500 (SPX) on September 10 is lower than the official S&P 500 Index closing price for SPX 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 prices are exactly equal, this market will resolve 50-50.
- Note that all figures will be rounded to the nearest cent using standard rounding.
- If SPX does not trade at all during the regular session, the market will resolve 50-50.
Frequently asked questions
- What are the current odds for S&P 500 (SPX) Opens Up or Down on September 10??
- Polymarket prices Down at 100% as of September 10, 2026.
- When does S&P 500 (SPX) Opens Up or Down on September 10? resolve?
- S&P 500 (SPX) Opens Up or Down on September 10? is scheduled to resolve on September 10, 2026.
- How is S&P 500 (SPX) Opens Up or Down on September 10? settled?
- Polymarket settles this market as follows: This market will resolve to "Up" if the official S&P 500 Index open price for S&P 500 (SPX) on September 10 is higher than the official S&P 500 Index closing price for SPX on the most recent prior trading day.
