S&P 500 (SPX) Up or Down on August 24? Odds & Prediction Markets

Name: S&P 500 (SPX) Up or Down on August 24?
Start: 2026-08-21T12:00:54.000Z
End: 2026-08-24T20:00:00.000Z

Description

This market will resolve to "Up" if the official S&P 500 Index closing price for S&P 500 (SPX) on Monday, August 24, 2026 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 closing price for S&P 500 (SPX) on Monday, August 24, 2026 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 specified closing 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 closing price published by S&P 500 Index for that shortened session will still be used for resolution. If either of the relevant days have 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 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 closing price for S&P 500 (SPX) on Monday, August 24, 2026 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 closing price for S&P 500 (SPX) on Monday, August 24, 2026 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 specified closing 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 closing price published by S&P 500 Index for that shortened session will still be used for resolution. If either of the relevant days have 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 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 short_topic dashboard tracks real-time odds, price history, and 24-hour volume of $98,803. It shows how traders on this single venue are positioning around the market’s direction as Aug 24, 2026 approaches. The interface updates continuously, reflecting the latest bets and sentiment without combining data from any other source.

This market resolves around Aug 24, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Traders will watch closing levels on that date to determine whether the market settles in favor of the up or down outcome, based solely on what is publicly recorded at that time.

Several signals could shift this market before Aug 24, 2026. Major economic reports like U.S. jobs data, inflation figures, or Federal Reserve policy announcements often drive broad market moves. Unexpected geopolitical developments, sudden corporate earnings shocks, or significant technical breakdowns in key indices may also impact trader sentiment. Additionally, broader risk-on or risk-off shifts in global markets can cause rapid repricing. Monitor key scheduled events and real-time market volatility for potential catalysts.

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