BackPPOLYMARKET

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

Yes36%

Vol$396.29

Outcomes2

36%

TradeTrade on Polymarket

MarketPOLYMARKETactive

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

MarketPOLYMARKETactiveOther

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

Part of: S&P 500 (SPX) Opens Up or Down on October 15?

DownDown Price

65¢

|

VolTotal Volume

$396.29

|

Outcomes

2

Ends

Oct 15, 2026

in about 22 hours

Trade on Polymarket

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

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

Down

65¢

|

Vol

$396.29

|

Outcomes

2

Up35.5¢

Down64.5¢

Price History

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

No historical data available

Price history will appear here when available

Resolution Info

Market Stats

Resolution Countdown

Resolves Today

October 15, 2026 • 8:00 PM

Last Updated

less than a minute ago

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

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

Resolution Information

Status

Active

Expected Resolution

October 15, 2026

8:00 PM GMT+0

UMA Protocol

Markets are resolved using the UMA optimistic oracle system with community verification.

Accuracy

99.7%

Resolved

15,420

Avg Time

< 2 hours

Disputes

0.3%

Resolution Criteria

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

Market Still Active

This market has not yet resolved. Resolution will occur after the specified end date based on the criteria above.