S&P 500 (SPX) Opens Up or Down on October 1?

According to the latest prediction market data for the query “S&P 500 (SPX) Opens Up or Down on October 1?”, traders have formed a strong consensus.

Currently, Up is dominating the market with an overwhelming 9,995% chance of winning. Down follows in second place at 5%. The betting volume for this specific market has already reached $230.3K, reflecting intense industry interest.

To better assess where each potential outcome stands, the market can be segmented into three distinct trading tiers based on implied probability and contract pricing:

🥇 Tier 1: The Dominant Leader

• Up (9,995%): Currently commanding the highest probability, Up is heavily favored by the order book. Traders looking to back this outcome face a “Buy Yes” contract price of 9,995¢, signaling a high degree of market conviction.

🥈 Tier 2: The Primary Challengers

• Down (5%): Positioned as the most viable alternative, Down maintains a 5% chance of resolving true. Its “Buy Yes” shares currently trade at 5¢.

This market will resolve to "Up" if the official S&P 500 Index open price for S&P 500 (SPX) on October 1 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 1 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