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S&P 500 (SPX) Opens Up or Down on October 26?
polymarket

S&P 500 (SPX) Opens Up or Down on October 26?

Volume:
$14,841

S&P 500 (SPX) Opens Up or Down on October 26?

 - Polymarket

S&P 500 (SPX) Opens Up or Down on October 26? - Polymarket

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Resolved Oct 26, 2026

Closed: Oct 26, 6:36 PM EST

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S&P 500 (SPX) Opens Up or Down on October 26?

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100%
20%
Yes 100¢No 0¢
—
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$14,841
N/A
N/A
N/A
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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 26 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 26 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 26 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 26 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

Currently, this market indicates a strong expectation for an upward open on October 26. Comparing this to traditional analyst forecasts, it's important to note that prediction markets often reflect a 'wisdom of the crowd' effect, potentially incorporating a broader range of information and perspectives than individual analyst reports. While analyst opinions vary, many anticipate moderate gains, aligning with the current sentiment reflected in this market. However, discrepancies can occur based on differing methodologies and risk assessments, so monitoring both sources provides a more comprehensive outlook.

On Polymarket, this market is priced through a continuous auction mechanism, where traders buy and sell shares representing their belief in the S&P 500 opening direction. The price of each share directly reflects the probability of that outcome occurring. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. As more traders participate, the price adjusts to reflect the collective assessment of the market. Currently, the 'Up' outcome has a higher price, indicating greater demand and a higher perceived probability. This dynamic pricing allows traders to express their views and profit from correctly predicting the market’s movement.

This market resolves around Oct 26, 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 October 26. The official opening price will be sourced from established financial data providers. Traders will then be able to claim their winnings or acknowledge their losses based on the final outcome. This ensures a transparent and verifiable resolution process.

Several factors could significantly influence this market before Oct 26, 2026. Major economic data releases, such as inflation reports or unemployment figures, could shift investor sentiment. Unexpected geopolitical events or corporate earnings announcements from key S&P 500 companies could also trigger price movements. Additionally, any shifts in Federal Reserve policy or statements from key policymakers could impact market expectations. Monitoring these events and their potential impact on investor confidence is crucial for understanding how this market might evolve in the coming days.