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S&P 500 (SPX) Up or Down on October 5?
polymarket

S&P 500 (SPX) Up or Down on October 5?

Volume:
$27,456

S&P 500 (SPX) Up or Down on October 5?

 - Polymarket

S&P 500 (SPX) Up or Down on October 5? - Polymarket

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Resolved Oct 5, 2026

Closed: Oct 5, 6:31 PM EST

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S&P 500 (SPX) Up or Down on October 5?

View
100%
38%
Yes 100¢No 0¢
—
N/A
$27,456
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 closing price for S&P 500 (SPX) on Monday, October 5, 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, October 5, 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, October 5, 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, October 5, 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 dashboard for the S&P 500 direction market displays the current odds that the S&P 500 index will be higher or lower on October 5. You can view the price history of the 'Up' and 'Down' outcomes, allowing you to analyze how sentiment has shifted over time. The dashboard also shows the 24-hour trading volume, currently at $26,231, and the total volume traded to date, which is $27,456. This provides insight into how actively traders are participating in this market.

On Polymarket, this market is priced through a continuous auction mechanism. Traders buy and sell shares representing their belief about whether the S&P 500 will be up or down on October 5. The price of these shares fluctuates based on supply and demand, effectively creating a real-time probability assessment. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price reflects the collective expectation of traders, and the closer we get to the resolution date, the more the price will converge towards either 100% (certainty of 'Up') or 0% (certainty of 'Down').

This market resolves around Oct 5, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Specifically, the direction will be determined by comparing the official closing price of the S&P 500 index on October 5 to its closing price on the day prior. If the closing price is higher, the 'Up' outcome wins; if it is lower, the 'Down' outcome wins. The resolution process relies on publicly available data to ensure transparency and accuracy.

Several key events could significantly influence this market before Oct 5, 2026. Major economic data releases, such as the September jobs report or inflation figures, could shift investor sentiment. Unexpected geopolitical developments or corporate earnings surprises could also trigger price movements. Furthermore, any statements from the Federal Reserve regarding monetary policy are likely to be closely watched and could impact the perceived likelihood of an S&P 500 increase or decrease. Monitoring these signals will be crucial for understanding potential shifts in this market.