PolymarketCheck availabilityNo KYCVerified resolution dataWell calibratedCurrent implied probability
Up 50%
Market quality
24 / 100
Low quality24h Volume
—
Liquidity
$15.6
Low liquidityBid / Ask
4.0% / 96.0%
Spread
92.0 pt
Wide spreadComments
0
Market data
Updated 30 minutes ago
Sep 24, 26, 8:15 PM UTCSep 25, 26, 8:00 PM UTC
Trends
Venue terms
Source: Polymarket
Informational venue terms only; CoinRithm paper trading uses its own rules.
- Minimum order (shares):
- 5
- Tick size:
- 1 percentage points
- Fees:
- Yes
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 September 25, 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 September 25, 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.
Open markets
EquitiesPOLYMARKETWill Anthropic’s valuation hit __ by December 31?
+13 more outcomes
- Total Vol
- $5.1M
- 24h Vol
- $30.6K
POLYMARKETOpenAI IPO Closing Market Cap
- 1.5T+-1.4pt59.4%
- No IPO by December 31, 2027+1.3pt21.8%
- 1.25T–1.5T+3.0pt9.9%
+4 more outcomes
- Total Vol
- $372.7K
- 24h Vol
- $15.5K
KALSHINasdaq-100 close price end of 2026?
- 33,000.01 or above20%
- 30,500 to 30,999.99+2.0pt7.8%
- 31,000 to 31,499.99-1.0pt6.1%
+27 more outcomes
- Total Vol
POLYMARKETWhat will S&P 500 (SPY) hit Week of September 21 2026?
+20 more outcomes
- Total Vol
- $32.8K
- 24h Vol
- $9.7K
POLYMARKETAnthropic IPO Closing Market Cap
- $2.0–$2.25T+1.3pt25%
- $2.25–$2.5T21.1%
- $1.75–$2.0T16.4%
+7 more outcomes
- Total Vol
KALSHIS&P close price end of 2026?
- 8,000 to 8,199.99+1.0pt17.3%
- 7,800 to 7,999.99+1.0pt16.4%
- 7,600 to 7,799.99-1.0pt11.8%
+24 more outcomes
- Total Vol
- Largest Company end of December 2026?
- Discord IPO Closing Market Cap
- Will Mar-27 S&P 500 Index Futures settle above $7,600 on December 31 2026?
- What will Rocket Lab USA, Inc. (RKLB) hit Week of September 21 2026?
- How high will the S&P get this year?
- First to list tokenized stocks in the US?
- What will Palantir Technologies Inc. (PLTR) hit Week of September 21 2026?
- What will Alphabet Inc. (GOOGL) hit Week of September 21 2026?
- STRC hits $100 by…
- What will Micron Technology, Inc. (MU) hit Week of September 21 2026?
Frequently asked questions
- What are the current odds for SPY Opens Up or Down on September 25??
- Polymarket prices Up at 50% as of September 25, 2026.
- When does SPY Opens Up or Down on September 25? resolve?
- SPY Opens Up or Down on September 25? is scheduled to resolve on September 25, 2026.
- How is SPY Opens Up or Down on September 25? settled?
- Polymarket settles this market as follows: This market will resolve to "Up" if the open price for S&P 500 (SPY) on September 25, 2026 is higher than the closing price for SPY on the most recent prior trading day.