PolymarketCheck availabilityNo KYC2% feeVerified resolution dataWell calibratedCurrent implied probability
Up 68%
Market quality
32 / 100
Low quality24h Volume
—
Liquidity
$9.6
Low liquidityBid / Ask
42.0% / 94.0%
Spread
52.0 pt
Wide spreadComments
0
Market data
Updated 11 minutes ago
Sep 17, 26, 12:00 PM UTCSep 18, 26, 8:00 PM UTC
Trends
Related Markets
Related questions for context, not a comparison of equivalent contracts.
SPY (SPY) Up or Down on September 17?
PolymarketS&P 500 (SPY) closes above ___ on September 17?
PolymarketWhat will S&P 500 (SPY) hit in September 2026?
PolymarketWhat will S&P 500 (SPY) hit Week of September 14 2026?
LimitlessWhat will AutoZone say during their next earnings call?
KalshiS&P close price end of 2026?
KalshiRules
This market will resolve to "Up" if the Close price for S&P 500 (SPY) on September 18, 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 18, 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
EquitiesPOLYMARKETLargest Company end of December 2026?
- NVIDIA+2.0pt72.5%
- Apple-3.9pt20.4%
- Alphabet7.1%
+5 more outcomes
- Total Vol
- $7.4M
- 24h Vol
- $91.8K
KALSHINasdaq-100 price on Sep 17, 2026 at 4pm EDT?
- 28,810 or above98%
- 28,860 or above98%
- 28,410 or above98%
+97 more outcomes
- Total Vol
- $76.7K
- 24h Vol
- $76.7K
KALSHIS&P price on Sep 17, 2026 at 10am EDT?
- 7,575 or above99%
- 7,550 or above99%
- 7,500 or above99%
+57 more outcomes
- Total Vol
- $68.3K
- 24h Vol
- $68.2K
KALSHIWhat will AutoZone say during their next earnings call?
- Same Store Sales98%
- Brazil98%
- Mega-Hub / Mega Hub-1.0pt98%
+11 more outcomes
- Total Vol
- $72.5K
KALSHIBoeing commercial airplane deliveries in 2026
- Above 560+3.0pt98%
- Above 580+5.0pt96%
- Above 600+1.0pt87%
+5 more outcomes
- Total Vol
KALSHIS&P close price end of 2026?
- 8,000 to 8,199.99+1.0pt15.9%
- 7,800 to 7,999.99-2.0pt15%
- 7,600 to 7,799.99+2.0pt14.2%
+24 more outcomes
- Total Vol
- S&P 500 (SPY) closes above ___ on September 17?
- How high will the S&P get this year?
- Will Anthropic’s valuation hit __ by December 31?
- S&P 500 (SPX) Up or Down on September 17?
- Nasdaq-100 close price end of 2026?
- (Pyth Index.US30/USD) price on Sep 17, 2026 at 4pm EDT
- SPY (SPY) Up or Down on September 17?
- MercadoLibre items sold in 2026
- KOSPI all-time high before 2028?
- S&P price on Sep 17, 2026 at 4pm EDT?
- Will OpenAI's valuation hit __ by December 31?
Frequently asked questions
- What are the current odds for SPY (SPY) Up or Down on September 18??
- Polymarket prices Up at 68% as of September 17, 2026.
- When does SPY (SPY) Up or Down on September 18? resolve?
- SPY (SPY) Up or Down on September 18? is scheduled to resolve on September 18, 2026.
- How is SPY (SPY) Up or Down on September 18? settled?
- Polymarket settles this market as follows: This market will resolve to "Up" if the Close price for S&P 500 (SPY) on September 18, 2026 is higher than the Close price for S&P 500 (SPY) on the most recent prior trading day.