PolymarketCheck availabilityNo KYC2% feeVerified resolution dataFairly calibratedCurrent implied probability
Down 96%+58.0pt
Market quality
74 / 100
Medium quality24h Volume
$25.6K
Liquidity
$13.6K
Medium liquidityBid / Ask
2.3% / 4.8%
Spread
2.5 pt
Moderate spreadComments
0
Market data
Updated 20 minutes ago
Aug 28, 26, 12:00 PMAug 31, 26, 8:00 PM
Trends
Rules
This market will resolve to "Up" if the Close price for S&P 500 (SPY) on August 31, 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 August 31, 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
Equities
LIMITLESSS&P 500 ETF (SPY) Up or Down - Daily
- Yes50%
- No50%
- Total Vol
- $70.3K
- 24h Vol
- $69.3K
LIMITLESSEQT Energy Company (EQT) Up or Down - Daily
- No74.5%
- Yes25.5%
- Total Vol
- $26.8K
- 24h Vol
- $26.3K
KALSHIBoeing commercial airplane deliveries in 2026
- Above 56092%
- Above 580-1.0pt88%
- Above 600-1.0pt84%
+5 more outcomes
- Total Vol
- $74.9K
KALSHINasdaq-100 price on Aug 31, 2026 at 4pm EDT?
- 29,200 or above81%
- 29,220 or above80%
- 29,170 or above80%
+97 more outcomes
- Total Vol
- $21.3K
- 24h Vol
- $21.2K
KALSHIS&P price on Aug 31, 2026 at 10am EDT?
- 7,620 or above99%
- 7,625 or above99%
- 7,630 or above99%
+57 more outcomes
- Total Vol
- $19K
- 24h Vol
- $18.3K
POLYMARKETOpenAI IPO Closing Market Cap
- 1.5T+-2.4pt53.5%
- 750B–1T+9.0pt13.9%
- 1.25T–1.5T-1.0pt13.9%
+4 more outcomes
- S&P 500 (SPX) Up or Down on August 31?
- Will Anthropic’s valuation hit __ by December 31?
- S&P close price end of 2026?
- Anthropic IPO Closing Market Cap
- What will S&P 500 (SPY) hit Week of August 31 2026?
- Anthropic IPO Closing Market Cap (Lower Brackets)
- Largest Company end of December 2026?
- Largest IPO by market cap in 2026?
- How high will the S&P get this year?
- S&P price on Aug 31, 2026 at 4pm EDT?
- Discord IPO Closing Market Cap
Frequently asked questions
- What are the current odds for SPY (SPY) Up or Down on August 31??
- Polymarket prices Down at 96% as of August 31, 2026.
- When does SPY (SPY) Up or Down on August 31? resolve?
- SPY (SPY) Up or Down on August 31? is scheduled to resolve on August 31, 2026.
- How is SPY (SPY) Up or Down on August 31? settled?
- Polymarket settles this market as follows: This market will resolve to "Up" if the Close price for S&P 500 (SPY) on August 31, 2026 is higher than the Close price for S&P 500 (SPY) on the most recent prior trading day.