{"source":"polymarket","id":"633007","ticker":"spx-opens-up-or-down-on-june-26-2026","slug":"spx-opens-up-or-down-on-june-26-2026","title":"S&P 500 (SPX) Opens Up or Down on June 26?","description":"This market will resolve to \"Up\" if the official S&P 500 Index open price for S&P 500 (SPX) on June 26 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 June 26 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":"2026-06-25T12:12:02.287158Z","end_date":"2026-06-26T20:00:00Z","closed_time":null,"volume":4306.003096,"volume_24hr":4306.003096,"volume_24h_change":null,"normalized_vol_24hr":21.692567825317383,"normalized_volume":14.633700370788574,"liquidity":2180.6703,"open_interest":3496.434011,"categories":["Finance"],"tags":[{"id":"102682","slug":"indicies","label":"Indicies"},{"id":"102683","slug":"spx","label":"SPX"},{"id":"102281","slug":"daily","label":"Daily"},{"id":"120","slug":"finance","label":"Finance"},{"id":"102169","slug":"hide-from-new","label":"Hide From New"},{"id":"102127","slug":"up-or-down","label":"Up or Down"}],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"","top_outcome_probability":0.095,"top_outcome_prob_24h_change":-0.405,"top_outcome_volume_24h_change":4316.003096,"updated_at":"2026-06-26T05:39:53.577869Z","fetched_at":"2026-06-26T05:39:53.577869Z","added_at":"2026-06-25T12:29:24.479646Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-june-26-2026","chart_24h":[0.0,0.0,0.0,151.02888,151.02888,151.02888,169.25887999999998,169.25887999999998,169.25887999999998,169.25887999999998,169.25887999999998,169.25887999999998,169.25887999999998,174.16854599999996,314.168546,326.89581699999997,529.596948,825.226575,906.226575,906.226575,1190.4535420000002,1452.1709119999998,1680.4444459999997,2998.6044460000003,3015.897231,3197.6030960000003,4306.003096],"markets":[{"source":"polymarket","id":"2681191","event_id":"633007","slug":"spx-opens-up-or-down-on-june-26-2026","question":"S&P 500 (SPX) Opens Up or Down on June 26?","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 June 26 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 June 26 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":[0.095,0.905],"probability":0.095,"spread":0.01,"active":true,"closed":false,"start_date":"2026-06-25T12:12:02.287158Z","end_date":"2026-06-26T20:00:00Z","closed_time":null,"volume":4316.003096,"volume_24hr":4316.003096,"prob_24h_change":-0.405,"volume_24h_change":4316.003096,"normalized_vol_24hr":23.4088191986084,"normalized_volume":19.42057991027832,"liquidity":2081.78,"categories":["Finance"],"countries":[],"updated_at":"2026-06-26T05:41:50.197652Z","fetched_at":"2026-06-26T05:39:53.727403Z","added_at":"2026-06-25T12:29:24.618671Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-june-26-2026/spx-opens-up-or-down-on-june-26-2026","event_title":"S&P 500 (SPX) Opens Up or Down on June 26?","chart_24h":[0.5,0.705,0.7,0.7,0.705,0.7,0.705,0.705,0.7,0.705,0.685,0.485,0.71,0.66,0.525,0.62,0.52,0.545,0.465,0.34,0.23,0.125,0.155,0.095,0.095]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/polymarket/633007","as_of":"2026-06-26T05:43:09.164595Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Polymarket): \"S&P 500 (SPX) Opens Up or Down on June 26?\" — top market at 10% probability across 1 outcome","source_url":null}}