{"_meta":{"attribution":"Data aggregated by pdata.world (https://pdata.world) from 8 prediction-market venues; CC BY 4.0; source data © each venue.","canonical_url":"https://pdata.world/events/polymarket/1356448","as_of":"2026-11-11T12:52:53.705514Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Polymarket): \"S&P 500 (SPX) Opens Up or Down on November 11?\" — 99% as of 2026-11-11 UTC. https://pdata.world/events/polymarket/1356448","source_url":"https://polymarket.com/event/spx-opens-up-or-down-on-november-11-2026"},"source":"polymarket","id":"1356448","ticker":"spx-opens-up-or-down-on-november-11-2026","slug":"spx-opens-up-or-down-on-november-11-2026","title":"S&P 500 (SPX) Opens Up or Down on November 11?","description":"This market will resolve to \"Up\" if the official S&P 500 Index open price for S&P 500 (SPX) on November 11 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 November 11 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":"2026-11-10T13:00:58Z","end_date":"2026-11-11T21:00:00Z","closed_time":null,"volume":3515.072862,"volume_24hr":3515.072862,"volume_24h_change":null,"normalized_vol_24hr":27.497055053710938,"normalized_volume":15.119650840759277,"liquidity":1326.3919,"open_interest":2919.519162,"categories":["Finance"],"tags":[{"id":"102683","slug":"spx","label":"SPX"},{"id":"102127","slug":"up-or-down","label":"Up or Down"},{"id":"102281","slug":"daily","label":"Daily"},{"id":"102682","slug":"indicies","label":"Indicies"},{"id":"120","slug":"finance","label":"Finance"},{"id":"102169","slug":"hide-from-new","label":"Hide From New"}],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"","top_outcome_probability":0.988,"top_outcome_prob_24h_change":0.488,"top_outcome_volume_24h_change":3515.072862,"updated_at":"2026-11-11T12:30:31.020631Z","fetched_at":"2026-11-11T12:30:31.020631Z","added_at":"2026-11-10T13:01:36.719852Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-november-11-2026","chart_24h":[0.0,0.0,0.0,283.333332,283.333332,283.333332,283.333332,283.333332,994.333332,1114.333332,1129.619045,1160.619045,1320.619045,1332.814167,1460.137028,1460.137028,1658.592911,1658.592911,1658.592911,1664.148461,1664.148461,1831.824995,2085.0928620000004,2095.092862,2425.072862,3275.072862],"kind":"live","mutually_exclusive":false,"markets_total":1,"markets":[{"source":"polymarket","id":"6930413","event_id":"1356448","slug":"spx-opens-up-or-down-on-november-11-2026","question":"S&P 500 (SPX) Opens Up or Down on November 11?","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 November 11 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 November 11 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":[0.988,0.012],"probability":0.988,"spread":0.004,"active":true,"closed":false,"start_date":"2026-11-10T13:00:58Z","end_date":"2026-11-11T21:00:00Z","closed_time":null,"result":null,"volume":3515.072862,"volume_24hr":3515.072862,"prob_24h_change":0.488,"volume_24h_change":3515.072862,"normalized_vol_24hr":29.96715545654297,"normalized_volume":19.56010627746582,"liquidity":1313.29426,"categories":["Finance"],"countries":[],"updated_at":"2026-11-11T12:30:31.183662Z","fetched_at":"2026-11-11T12:30:31.183662Z","added_at":"2026-11-10T13:01:36.894133Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-november-11-2026/spx-opens-up-or-down-on-november-11-2026","event_title":"S&P 500 (SPX) Opens Up or Down on November 11?","chart_24h":[0.5,0.74,0.44,0.69,0.64,0.66,0.585,0.805,0.805,0.88,0.895,0.88,0.88,0.88,0.885,0.955,0.96,0.958,0.963,0.988,0.988]}]}