{"source":"polymarket","id":"587034","ticker":"spx-opens-up-or-down-on-june-15-2026","slug":"spx-opens-up-or-down-on-june-15-2026","title":"S&P 500 (SPX) Opens Up or Down on June 15?","description":"This market will resolve to \"Up\" if the official S&P 500 Index open price for S&P 500 (SPX) on June 15 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 15 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":"2026-06-12T12:27:15.727079Z","end_date":"2026-06-15T20:00:00Z","closed_time":null,"volume":5957.086996,"volume_24hr":5083.642239,"volume_24h_change":null,"normalized_vol_24hr":21.70952033996582,"normalized_volume":16.239809036254883,"liquidity":9127.9438,"open_interest":6220.514983,"categories":["Finance"],"tags":[{"id":"120","slug":"finance","label":"Finance"},{"id":"104181","slug":"rewards-automation-400-4pt5-50-1","label":"Rewards Automation 400, 4.5, 50 (1) Deprec"},{"id":"102127","slug":"up-or-down","label":"Up or Down"},{"id":"102683","slug":"spx","label":"SPX"},{"id":"102281","slug":"daily","label":"Daily"},{"id":"102682","slug":"indicies","label":"Indicies"},{"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":0.96,"top_outcome_prob_24h_change":0.355,"top_outcome_volume_24h_change":4781.510437000001,"updated_at":"2026-06-15T03:08:17.460003Z","fetched_at":"2026-06-15T03:08:17.460003Z","added_at":"2026-06-12T12:14:58.053572Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-june-15-2026","chart_24h":[337.595702,369.208604,385.71597499999996,385.71597499999996,385.71597499999996,345.71597499999996,363.457909,401.057909,462.635209,462.635209,462.635209,458.269009,354.269009,354.269009,354.269009,249.26900899999998,249.26900899999998,249.26900899999998,267.00900899999993,267.00900899999993,289.50900899999993,287.1232959999999,287.1232959999999,302.633296,304.86329599999993,304.86329599999993,509.35063399999996,3192.1874999999995,4245.535812,4265.535812,4378.035812,4715.763086,4705.758347999999],"markets":[{"source":"polymarket","id":"2516768","event_id":"587034","slug":"spx-opens-up-or-down-on-june-15-2026","question":"S&P 500 (SPX) Opens Up or Down on June 15?","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 15 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 15 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":[0.96,0.04],"probability":0.96,"spread":0.02,"active":true,"closed":false,"start_date":"2026-06-12T12:03:39.458474Z","end_date":"2026-06-15T20:00:00Z","closed_time":null,"volume":5972.550896,"volume_24hr":5099.106139,"prob_24h_change":0.355,"volume_24h_change":4781.510437000001,"normalized_vol_24hr":25.50217628479004,"normalized_volume":22.181812286376953,"liquidity":7223.6081,"categories":["Finance"],"countries":[],"updated_at":"2026-06-15T03:09:11.200351Z","fetched_at":"2026-06-15T03:08:17.644938Z","added_at":"2026-06-12T12:14:58.147806Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-june-15-2026/spx-opens-up-or-down-on-june-15-2026","event_title":"S&P 500 (SPX) Opens Up or Down on June 15?","chart_24h":[0.61,0.585,0.575,0.575,0.6,0.6,0.66,0.675,0.67,0.67,0.67,0.675,0.675,0.685,0.64,0.655,0.65,0.645,0.645,0.645,0.655,0.655,0.66,0.66,0.66,0.85,0.87,0.9,0.91,0.93,0.94,0.955]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/polymarket/587034","as_of":"2026-06-15T03:14:39.395670Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Polymarket): \"S&P 500 (SPX) Opens Up or Down on June 15?\" — top market at 96% probability across 1 outcome","source_url":null}}