PolymarketCheck availabilityNo KYC2% feeVerified resolution dataWell calibratedCurrent implied probability
Down 84%+23.5pt
Market quality
65 / 100
Medium quality24h Volume
$4.3K
Liquidity
$6.3K
Medium liquidityBid / Ask
14.0% / 18.0%
Spread
4.0 pt
Moderate spreadComments
0
Market data
Updated 11 minutes ago
Sep 4, 26, 12:01 PM UTCSep 8, 26, 8:00 PM UTC
Trends
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Related questions for context, not a comparison of equivalent contracts.
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KalshiRules
This market will resolve to "Up" if the Close price for S&P 500 (SPY) on September 8, 2026 is higher than the Close price for S&P 500 (SPY) on the most recent prior trading day.
- This market will resolve to "Down" if the Close price for S&P 500 (SPY) on September 8, 2026 is lower than the Close price for S&P 500 (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 closing prices are exactly equal, this market will resolve 50-50.
- Closing 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.
Open markets
EquitiesKALSHIBoeing commercial airplane deliveries in 2026
- Above 56095%
- Above 580-1.0pt90%
- Above 60086%
+5 more outcomes
- Total Vol
- $211.6K
- 24h Vol
- $45.2K
KALSHIS&P close price end of 2026?
- 7,800 to 7,999.99-1.0pt16.7%
- 8,000 to 8,199.99-2.0pt14.7%
- 7,600 to 7,799.9910.8%
+24 more outcomes
- Total Vol
- $6.4M
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- NVIDIA+1.0pt77.7%
- Apple+0.7pt13.6%
- Alphabet6.8%
+5 more outcomes
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- Anthropic+1.6pt60.2%
- SpaceX-4.5pt37.8%
- OpenAI+0.1pt2%
+9 more outcomes
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- 1.5T++13.3pt77.9%
- 1.25T–1.5T-4.5pt7.7%
- 1T–1.25T-1.3pt5.8%
+4 more outcomes
POLYMARKETS&P 500 (SPX) Up or Down on September 8?
- Down+3.0pt73%
- Up-3.0pt27%
- Total Vol
- $19.6K
- 24h Vol
- $17.5K
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Frequently asked questions
- What are the current odds for SPY (SPY) Up or Down on September 8??
- Polymarket prices Down at 84% as of September 8, 2026.
- When does SPY (SPY) Up or Down on September 8? resolve?
- SPY (SPY) Up or Down on September 8? is scheduled to resolve on September 8, 2026.
- How is SPY (SPY) Up or Down on September 8? settled?
- Polymarket settles this market as follows: This market will resolve to "Up" if the Close price for S&P 500 (SPY) on September 8, 2026 is higher than the Close price for S&P 500 (SPY) on the most recent prior trading day.