{"$schema":"https://gamma-api.polymarket.com/schemas/Market.json","id":"5773011","question":"S&P 500 (SPX) Opens Up or Down on October 19?","conditionId":"0x384b7fb490672a0d01ff3676de88287ffc98498556e31e8aa0a1c52685276b50","slug":"spx-opens-up-or-down-on-october-19-2026","resolutionSource":"https://www.wsj.com/market-data/stocks","endDate":"2026-10-19T20:00:00Z","liquidity":"70.0283","startDate":"2026-10-16T12:00:58Z","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 19 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 19 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":"[\"0.46\", \"0.54\"]","volume":"10","active":true,"closed":false,"marketMakerAddress":"","createdAt":"2026-10-16T12:00:51.246292Z","updatedAt":"2026-10-18T11:05:15.838306Z","new":false,"featured":false,"submitted_by":"0xAC9930b2AE455a671b62dE86876A7e8587825294","archived":false,"resolvedBy":"0x65070BE91477460D8A7AeEb94ef92fe056C2f2A7","restricted":true,"questionID":"0x872ee7efdac51ffb55d2fcdc035717cf6ffc44d7ff0ecbbcbecba22e4be11ba1","enableOrderBook":true,"orderPriceMinTickSize":0.01,"orderMinSize":5,"volumeNum":10,"liquidityNum":70.0283,"endDateIso":"2026-10-19","startDateIso":"2026-10-16","hasReviewedDates":true,"volume24hr":10,"volume1wk":10,"volume1mo":10,"volume1yr":10,"gameStartTime":"2026-10-18 21:00:00+00","clobTokenIds":"[\"340722681842400239659914538048019936610564352942507308654779735462601846733\", \"100651844611391271729247201993929718351524853928698294264124988582406372437749\"]","comboStatus":"disabled","umaBond":"250","umaReward":"0.6","volume24hrClob":10,"volume1wkClob":10,"volume1moClob":10,"volume1yrClob":10,"volumeClob":10,"liquidityClob":70.0283,"makerBaseFee":1000,"takerBaseFee":1000,"acceptingOrders":true,"negRisk":false,"ready":false,"funded":false,"acceptingOrdersTimestamp":"2026-10-16T12:00:58Z","cyom":false,"competitive":0.33945686900958466,"approved":true,"clobRewards":[{"id":"3933718","conditionId":"0x384b7fb490672a0d01ff3676de88287ffc98498556e31e8aa0a1c52685276b50","assetAddress":"0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174","rewardsAmount":0,"rewardsDailyRate":1,"startDate":"2026-10-16","endDate":"2500-12-31"}],"rewardsMinSize":20,"rewardsMaxSpread":4.5,"spread":0.66,"oneDayPriceChange":-0.075,"bestBid":0.13,"bestAsk":0.79,"automaticallyActive":true,"clearBookOnStart":false,"manualActivation":false,"negRiskOther":false,"umaResolutionStatuses":"[]","pendingDeployment":false,"deploying":false,"deployingTimestamp":"2026-10-16T12:00:51.452223Z","rfqEnabled":false,"eventStartTime":"2026-10-19T13:30:00Z","holdingRewardsEnabled":false,"feesEnabled":true,"feeType":"finance_prices_fees","feeSchedule":{"exponent":1,"rate":0.04,"takerOnly":true,"rebateRate":0.25},"fallbackResolutionType":"none","version":"v1"}