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| Outcome | Chance | 24h | 1 week | Bid · Ask | 24h volume | Ends |
|---|---|---|---|---|---|---|
| Yes | 100% | +45 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| When | Trader | Outcome | Bet | Size | P&L now | Insider |
|---|---|---|---|---|---|---|
| 247d | 527-505 | S&P 500 (SPX) Opens Up or Down on February 18? | SellUp>99¢ | $1,649 | −$2 −0.1% | — |
| 247d | Yanncll | S&P 500 (SPX) Opens Up or Down on February 18? | SellUp>99¢ | $4,084 | −$4 −0.1% | — |
| 247d | Nonstop-Bulk | S&P 500 (SPX) Opens Up or Down on February 18? | SellUp>99¢ | $1,197 | −$1 −0.1% | — |
| 247d | Krown | S&P 500 (SPX) Opens Up or Down on February 18? | SellUp>99¢ | $1,722 | −$2 −0.1% | — |
| 247d |  zeroprobability | S&P 500 (SPX) Opens Up or Down on February 18? | SellUp>99¢ | $5,468 | −$5 −0.1% | — |
| 247d |  NotMasterFan | S&P 500 (SPX) Opens Up or Down on February 18? | BuyUp>99¢ | $3,996 | +$4 +0.1% | 4 |
| 247d |  ArmageddonRewardsBilly | S&P 500 (SPX) Opens Up or Down on February 18? | BuyUp>99¢ | $2,922 | +$3 +0.1% | 4 |
| 247d |  residual | S&P 500 (SPX) Opens Up or Down on February 18? | SellUp>99¢ | $1,074 | −$1 −0.1% | — |
| 247d |  VdeVolsa | S&P 500 (SPX) Opens Up or Down on February 18? | BuyUp>99¢ | $8,192 | +$8 +0.1% | 4 |
| 247d | xenonliu2 fills | S&P 500 (SPX) Opens Up or Down on February 18? | BuyUp>99¢ | $9,484 | +$20 +0.2% | 4 |
| 247d | 0xe617…f2512 fills | S&P 500 (SPX) Opens Up or Down on February 18? | BuyUp>99¢ | $6,000 | +$26 +0.4% | 4 |
| 247d | gmfineshy | S&P 500 (SPX) Opens Up or Down on February 18? | SellUp90¢ → 100¢ | $1,306 | −$144 −11% | — |
| 247d | DegenEriccro | S&P 500 (SPX) Opens Up or Down on February 18? | SellUp98¢ → 100¢ | $1,069 | −$27 −2.6% | — |
| 247d | DegenEriccro | S&P 500 (SPX) Opens Up or Down on February 18? | BuyUp98¢ → 100¢ | $1,470 | +$30 +2.0% | 5 |
| 247d | Yanncll | S&P 500 (SPX) Opens Up or Down on February 18? | BuyUp98¢ → 100¢ | $4,000 | +$88 +2.2% | 5 |
| 247d | Nonstop-Bulk | S&P 500 (SPX) Opens Up or Down on February 18? | BuyUp95¢ → 100¢ | $1,139 | +$60 +5.3% | 5 |
| 247d |  CoffeeLover | S&P 500 (SPX) Opens Up or Down on February 18? | BuyUp93¢ → 100¢ | $1,298 | +$98 +7.5% | 6 |
| 247d | 0x9c13…ed01 | S&P 500 (SPX) Opens Up or Down on February 18? | BuyUp89¢ → 100¢ | $1,300 | +$161 +12% | 7 |
| 248d |  DOCW | S&P 500 (SPX) Opens Up or Down on February 18? | SellDown45¢ → 0¢ | $1,014 | +$1,014 +100% | — |
This market will resolve to "Up" if the official S&P 500 Index open price for S&P 500 (SPX) on February 18 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 February 18 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
Sources: Polymarket's Gamma API, its CLOB price history and its Data API, read every two minutes. Prices are each outcome's Yes price, which is the market's probability: 100¢ for Yes means the market gives it about 100%.