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S&P 500 (SPX) Opens Up or Down on June 15?
polymarket

S&P 500 (SPX) Opens Up or Down on June 15?

Volume:
$22,933

S&P 500 (SPX) Opens Up or Down on June 15?

 - Polymarket

S&P 500 (SPX) Opens Up or Down on June 15? - Polymarket

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Resolved Jun 15, 2026

Closed: Jun 15, 4:00 PM EST

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S&P 500 (SPX) Opens Up or Down on June 15?

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$22,933
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 June 15 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 June 15 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 June 15 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 June 15 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 S&P 500 opening direction market dashboard tracks real-time odds on whether the index will open higher or lower on June 15. The interface displays current bid-ask spreads, historical price movement, and trading volume to help participants monitor sentiment shifts. This market reflects live trader positioning as the event date approaches, offering a transparent window into collective expectations around market direction at the open.

Prediction market odds often diverge from traditional analyst forecasts because they aggregate real-money incentives rather than opinion surveys. While equity strategists may issue directional calls based on fundamental analysis, this market prices in the aggregated bets of thousands of traders responding to overnight news, futures moves, and economic data. The two approaches complement each other: analysts provide reasoning, while prediction markets reveal what informed participants are willing to stake on the actual outcome.

On Polymarket, traders set the odds through an automated market maker that adjusts prices based on buy and sell volume. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Each outcome—up or down—has a price between 0 and 1 representing the implied probability. As traders buy shares in one direction, the price rises and the opposing outcome falls, creating continuous price discovery. This mechanism ensures liquidity and reflects the real-time consensus on the S&P 500's opening direction.

This market resolves around Jun 15, 2026, once the S&P 500's opening price on June 15 is verified against credible public sources. The outcome is determined by whether the index opens above or below its previous close. Resolution is straightforward and objective, tied to official market data published by exchanges and financial data providers, ensuring all participants have access to the same factual basis for settlement.

Overnight economic data, Federal Reserve communications, earnings surprises, and geopolitical developments can all shift opening direction expectations. Futures trading in Asia and Europe often sets the tone before the U.S. open, and any major news overnight will be reflected in pre-market sentiment. Volatility spikes, changes in Treasury yields, or shifts in sector rotation can also influence trader positioning. The closer to June 15, the more weight overnight catalysts carry in determining final odds.