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| Outcome | Chance | 24h | 1 week | Bid · Ask | 24h volume | Ends |
|---|---|---|---|---|---|---|
| Yes | 0% | −59 pts | — | — · <1¢ | — | ended |
| When | Trader | Outcome | Bet | Size | P&L now | Insider |
|---|---|---|---|---|---|---|
| 163d |  1kto1m | S&P 500 (SPX) Opens Up or Down on May 12? | SellDown>99¢ | $1,073 | −$1 −0.1% | — |
| 164d | anon.1980.123 | S&P 500 (SPX) Opens Up or Down on May 12? | SellDown>99¢ | $6,637 | −$7 −0.1% | — |
| 164d | FlyingPlaty | S&P 500 (SPX) Opens Up or Down on May 12? | BuyDown>99¢ | $7,016 | +$7 +0.1% | 4 |
| 164d |  TheRealestJOE2 fills | S&P 500 (SPX) Opens Up or Down on May 12? | BuyDown>99¢ | $3,107 | +$4 +0.1% | 4 |
| 164d |  largeleeks888 | S&P 500 (SPX) Opens Up or Down on May 12? | BuyDown>99¢ | $3,682 | +$4 +0.1% | 4 |
| 164d | xenonliu | S&P 500 (SPX) Opens Up or Down on May 12? | BuyDown>99¢ | $12,488 | +$13 +0.1% | 4 |
| 164d | twerk4hv | S&P 500 (SPX) Opens Up or Down on May 12? | BuyDown>99¢ | $4,397 | +$9 +0.2% | 4 |
| 164d | cryptothan | S&P 500 (SPX) Opens Up or Down on May 12? | BuyDown99¢ → 100¢ | $1,788 | +$19 +1.1% | 4 |
| 164d | 0xe617…f251 | S&P 500 (SPX) Opens Up or Down on May 12? | BuyDown99¢ → 100¢ | $3,500 | +$43 +1.2% | 4 |
| 164d | Incognitoo2 fills | S&P 500 (SPX) Opens Up or Down on May 12? | BuyDown99¢ → 100¢ | $2,575 | +$36 +1.4% | 4 |
| 164d |  greedymartin | S&P 500 (SPX) Opens Up or Down on May 12? | BuyDown99¢ → 100¢ | $1,612 | +$18 +1.1% | 4 |
| 164d | anon.1980.1232 fills | S&P 500 (SPX) Opens Up or Down on May 12? | BuyDown96¢ → 100¢ | $5,208 | +$229 +4.4% | 5 |
| 164d | allin69 | S&P 500 (SPX) Opens Up or Down on May 12? | BuyDown94¢ → 100¢ | $1,880 | +$120 +6.4% | 6 |
This market will resolve to "Up" if the official S&P 500 Index open price for S&P 500 (SPX) on May 12 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 May 12 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: 0¢ for Yes means the market gives it about 0%.