{"source":"polymarket","id":"651237","ticker":"spx-opens-up-or-down-on-july-1-2026","slug":"spx-opens-up-or-down-on-july-1-2026","title":"S&P 500 (SPX) Opens Up or Down on July 1?","description":"This market will resolve to \"Up\" if the official S&P 500 Index open price for S&P 500 (SPX) on July 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 July 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","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","active":true,"closed":false,"start_date":"2026-06-30T12:02:01.350799Z","end_date":"2026-07-01T20:00:00Z","closed_time":null,"volume":4143.399706,"volume_24hr":4143.399706,"volume_24h_change":null,"normalized_vol_24hr":20.738056182861328,"normalized_volume":14.331016540527344,"liquidity":1518.4963,"open_interest":3244.562566,"categories":["Finance"],"tags":[{"id":"102682","slug":"indicies","label":"Indicies"},{"id":"120","slug":"finance","label":"Finance"},{"id":"102169","slug":"hide-from-new","label":"Hide From New"},{"id":"102683","slug":"spx","label":"SPX"},{"id":"102127","slug":"up-or-down","label":"Up or Down"},{"id":"102281","slug":"daily","label":"Daily"}],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"","top_outcome_probability":0.23,"top_outcome_prob_24h_change":-0.27,"top_outcome_volume_24h_change":4143.399706,"updated_at":"2026-07-01T06:40:00.289263Z","fetched_at":"2026-07-01T06:40:00.289263Z","added_at":"2026-06-30T12:08:34.374190Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-july-1-2026","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,60.0,72.820509,72.820509,72.820509,515.005693,555.005693,586.255693,586.255693,586.255693,816.255693,2203.398978,2328.398978,2328.398978,2395.0669270000003,2415.0669270000003,2415.0669270000003,2458.338353,2637.608353,4143.399706],"markets":[{"source":"polymarket","id":"2742819","event_id":"651237","slug":"spx-opens-up-or-down-on-july-1-2026","question":"S&P 500 (SPX) Opens Up or Down on July 1?","group_item_title":null,"description":"This market will resolve to \"Up\" if the official S&P 500 Index open price for S&P 500 (SPX) on July 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 July 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","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","outcomes":["Up","Down"],"outcome_prices":[0.23,0.77],"probability":0.23,"spread":0.04,"active":true,"closed":false,"start_date":"2026-06-30T12:02:01.350799Z","end_date":"2026-07-01T20:00:00Z","closed_time":null,"volume":4143.399706,"volume_24hr":4143.399706,"prob_24h_change":-0.27,"volume_24h_change":4143.399706,"normalized_vol_24hr":24.52043342590332,"normalized_volume":20.117115020751953,"liquidity":1567.9738,"categories":["Finance"],"countries":[],"updated_at":"2026-07-01T06:40:49.770416Z","fetched_at":"2026-07-01T06:40:00.311163Z","added_at":"2026-06-30T12:08:34.407850Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-july-1-2026/spx-opens-up-or-down-on-july-1-2026","event_title":"S&P 500 (SPX) Opens Up or Down on July 1?","chart_24h":[0.5,0.49,0.625,0.625,0.655,0.65,0.635,0.62,0.605,0.595,0.64,0.64,0.665,0.605,0.61,0.65,0.535,0.53,0.53,0.525,0.47,0.26,0.305,0.31,0.4,0.305,0.305,0.29,0.245,0.23]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/polymarket/651237","as_of":"2026-07-01T06:44:36.601678Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Polymarket): \"S&P 500 (SPX) Opens Up or Down on July 1?\" — top market at 23% probability across 1 outcome","source_url":null}}