{"$schema":"https://gamma-api.polymarket.com/schemas/Market.json","id":"5153630","question":"S&P 500 (SPX) Opens Up or Down on October 1?","conditionId":"0xfbca80b14104dc52bc1485a61841f41ca1450afd4cc709984a56b9756c84d2f7","slug":"spx-opens-up-or-down-on-october-1-2026","resolutionSource":"https://www.wsj.com/market-data/stocks","endDate":"2026-10-01T20:00:00Z","liquidity":"48294.30642","startDate":"2026-09-30T12:00:58Z","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/s-and-p-500-1e40af6979.png","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/s-and-p-500-1e40af6979.png","description":"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.\n\nThis 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.\n\nE.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.\n\nIf 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.\n\nIf SPX does not trade at all during the regular session, the market will resolve 50-50.\n\nIf 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.\n\nIf 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.\n\nThe resolution source for this market is the Wall Street Journal, specifically the Open/Close values published by the WSJ under \"Historical Prices\".\n\nUS: https://www.wsj.com/market-data/stocks\nEMEA: https://www.wsj.com/market-data/stocks/emea\nASIA: https://www.wsj.com/market-data/stocks/asia","outcomes":"[\"Up\", \"Down\"]","outcomePrices":"[\"0.9995\", \"0.0005\"]","volume":"296338.72886599996","active":true,"closed":false,"marketMakerAddress":"","createdAt":"2026-09-30T12:00:51.236695Z","updatedAt":"2026-10-01T20:01:23.205788Z","new":false,"featured":false,"archived":false,"resolvedBy":"0x65070BE91477460D8A7AeEb94ef92fe056C2f2A7","restricted":true,"questionID":"0x2a9d6d2cfe83fcaa5c1c05aa62d4150619c8ca45582b1c0bea495c4b0ee64268","enableOrderBook":true,"orderPriceMinTickSize":0.001,"orderMinSize":5,"volumeNum":296338.72886599996,"liquidityNum":48294.30642,"endDateIso":"2026-10-01","startDateIso":"2026-09-30","hasReviewedDates":true,"volume24hr":296336.506643,"volume1wk":296338.728866,"volume1mo":296338.728866,"volume1yr":296338.728866,"gameStartTime":"2026-09-30 21:00:00+00","clobTokenIds":"[\"11841327366358543855039404255021255865740252515518885943840064629663639352564\", \"65509094726371450403664631115531377942134114032922058656608604962972762574059\"]","comboStatus":"disabled","umaBond":"250","umaReward":"0.6","volume24hrClob":296336.506643,"volume1wkClob":296338.728866,"volume1moClob":296338.728866,"volume1yrClob":296338.728866,"volumeClob":296338.72886599996,"liquidityClob":48294.30642,"makerBaseFee":1000,"takerBaseFee":1000,"acceptingOrders":true,"negRisk":false,"ready":false,"funded":false,"acceptingOrdersTimestamp":"2026-09-30T12:00:58Z","cyom":false,"competitive":0.8003199679231757,"pagerDutyNotificationEnabled":false,"approved":true,"rewardsMinSize":100,"rewardsMaxSpread":2.5,"spread":0.001,"oneDayPriceChange":0.4695,"lastTradePrice":0.999,"bestBid":0.999,"bestAsk":1,"automaticallyActive":true,"clearBookOnStart":false,"manualActivation":false,"negRiskOther":false,"umaResolutionStatuses":"[]","pendingDeployment":false,"deploying":false,"deployingTimestamp":"2026-09-30T12:00:51.639135Z","rfqEnabled":false,"eventStartTime":"2026-10-01T13:30:00Z","holdingRewardsEnabled":false,"feesEnabled":true,"feeType":"finance_prices_fees","feeSchedule":{"exponent":1,"rate":0.04,"takerOnly":true,"rebateRate":0.25},"version":"v1"}