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S&P 500 (SPX) Opens Up or Down on September 14?
polymarket

S&P 500 (SPX) Opens Up or Down on September 14?

Volume:
$12,332

S&P 500 (SPX) Opens Up or Down on September 14?

 - Polymarket

S&P 500 (SPX) Opens Up or Down on September 14? - Polymarket

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Resolved Sep 14, 2026

Closed: Sep 14, 6:30 PM EST

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S&P 500 (SPX) Opens Up or Down on September 14?

View
0%
16%
Yes 0¢No 100¢
—
N/A
$12,332
N/A
N/A
N/A
Settled
Yes
Total markets: 1

Description

This market will resolve to "Up" if the official S&P 500 Index open price for S&P 500 (SPX) on September 14 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 14 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. If either of the relevant days are shortened (for example, due to a market holiday schedule), the official open/close price published by S&P 500 Index for that shortened session will still be used for resolution. If the previous trading day has no official closing price (for example, due to a trading halt into the market close, system issue, delisting, or other disruption), the market will use the last valid on-exchange trade price of the regular session as the effective closing price. The resolution source for this market is the Wall Street Journal, specifically the Open/Close values published by the WSJ under "Historical Prices". US: https://www.wsj.com/market-data/stocks EMEA: https://www.wsj.com/market-data/stocks/emea ASIA: https://www.wsj.com/market-data/stocks/asia

Polymarket

This market will resolve to "Up" if the official S&P 500 Index open price for S&P 500 (SPX) on September 14 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 14 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. If either of the relevant days are shortened (for example, due to a market holiday schedule), the official open/close price published by S&P 500 Index for that shortened session will still be used for resolution. If the previous trading day has no official closing price (for example, due to a trading halt into the market close, system issue, delisting, or other disruption), the market will use the last valid on-exchange trade price of the regular session as the effective closing price. The resolution source for this market is the Wall Street Journal, specifically the Open/Close values published by the WSJ under "Historical Prices". US: https://www.wsj.com/market-data/stocks EMEA: https://www.wsj.com/market-data/stocks/emea ASIA: https://www.wsj.com/market-data/stocks/asia

Frequently asked questions

On Polymarket, the dashboard for the S&P 500 opening direction market displays the current odds of the S&P 500 opening up or down on September 14. You can view the probability assigned to each outcome, as well as the historical price action of the market. The dashboard also shows the 24-hour trading volume, currently at $12,119, and the total volume traded to date, which is $12,327. This provides a real-time view of how traders are assessing the potential movement of the S&P 500.

Currently, the prevailing sentiment in this market suggests a strong expectation for an upward open on September 14. This differs from some traditional analyst forecasts, which present a more mixed outlook regarding the S&P 500's direction. While analysts consider a wider range of economic indicators and company-specific data, this market reflects the collective judgment of traders willing to put capital behind their beliefs. It’s important to remember that prediction market odds represent a probabilistic view, similar to a poll, and are not necessarily a precise forecast of the future.

This market resolves around Sep 14, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Specifically, the resolution will be based on whether the S&P 500 index opened higher or lower than the previous day’s closing price on September 14. The opening price will be sourced from a widely recognized financial data provider, ensuring a transparent and objective determination of the result. Traders will then be able to claim their winnings or acknowledge their losses based on the final outcome.

Several key events could significantly influence this market before Sep 14, 2026. Unexpected economic data releases, such as inflation figures or employment reports, could shift investor sentiment. Geopolitical developments, including any escalating international tensions, also have the potential to impact market confidence. Furthermore, major corporate earnings announcements or surprising news from influential companies within the S&P 500 could trigger price movements in this market. Any significant overnight news or shifts in global market trends will likely be reflected in the trading activity.