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S&P 500 (SPX) Opens Up or Down on October 12?
polymarket

S&P 500 (SPX) Opens Up or Down on October 12?

Volume:
$6,425

S&P 500 (SPX) Opens Up or Down on October 12?

 - Polymarket

S&P 500 (SPX) Opens Up or Down on October 12? - Polymarket

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Resolved Oct 12, 2026

Closed: Oct 12, 6:43 PM EST

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polymarket

S&P 500 (SPX) Opens Up or Down on October 12?

View
100%
41%
Yes 100¢No 0¢
—
N/A
$6,425
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 October 12 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 October 12 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 October 12 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 October 12 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 October 12. You can view the price history of the market, allowing you to see how sentiment has shifted over time. The dashboard also shows the 24-hour volume, currently at $6,317, and the total volume traded to date, which is $6,425. This provides insight into how actively traders are participating in this market and the level of interest surrounding the potential movement of the S&P 500.

Currently, the odds in this market reflect a collective prediction about the S&P 500’s opening direction. These predictions are formed by individuals trading based on their own research and insights, and can differ from traditional analyst forecasts. While many analysts are predicting a moderate increase in the S&P 500, this market provides a different perspective, aggregating the wisdom of the crowd. It’s important to consider both viewpoints when forming your own opinion about the likely outcome, as both sources of information offer unique value.

On Polymarket, this market is priced through a continuous exchange where traders buy and sell shares representing their belief in whether the S&P 500 will open up or down. The price of these shares fluctuates based on supply and demand, reflecting the collective sentiment of the traders. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. As more traders believe the S&P 500 will open up, the price of 'up' shares increases, and vice versa. This dynamic pricing mechanism allows the market to quickly incorporate new information and adjust its predictions accordingly, offering a real-time assessment of potential market movement.

This market resolves around Oct 12, 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 its previous day’s closing price on October 12. The opening price will be determined by standard financial data providers and reported by major financial news outlets. This ensures a transparent and objective determination of the market's outcome, based on widely accepted market data.

Several signals or events could significantly impact this market before Oct 12, 2026. Unexpected economic data releases, such as inflation reports or employment figures, could shift market sentiment. Geopolitical events or major corporate earnings announcements could also play a role. Furthermore, any news related to Federal Reserve policy or interest rate expectations could influence traders’ beliefs about the S&P 500’s future direction. A sudden shift in investor risk appetite, driven by unforeseen circumstances, could also cause substantial movement in this market.