{"source":"polymarket","id":"600967","ticker":"spx-opens-up-or-down-on-june-17-2026","slug":"spx-opens-up-or-down-on-june-17-2026","title":"S&P 500 (SPX) Opens Up or Down on June 17?","description":"This market will resolve to \"Up\" if the official S&P 500 Index open price for S&P 500 (SPX) on June 17 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 17 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":"2026-06-16T12:18:43.219195Z","end_date":"2026-06-17T20:00:00Z","closed_time":null,"volume":3884.0495680000004,"volume_24hr":3884.0495679999995,"volume_24h_change":null,"normalized_vol_24hr":20.240968704223633,"normalized_volume":14.580216407775879,"liquidity":2029.5054,"open_interest":2941.473424,"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":0.715,"top_outcome_prob_24h_change":0.21499999999999997,"top_outcome_volume_24h_change":3848.6485699999994,"updated_at":"2026-06-17T03:54:41.345033Z","fetched_at":"2026-06-17T03:54:41.345033Z","added_at":"2026-06-16T12:19:25.585860Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-june-17-2026","chart_24h":[0.0,35.400998,35.400998,35.400998,45.400998,45.400998,45.400998,45.400998,45.400998,45.400998,45.400998,45.400998,45.400998,289.080826,289.080826,313.080826,331.080826,356.080826,489.080826,2072.848647,2377.8288119999997,2520.397729,3353.1294309999994],"markets":[{"source":"polymarket","id":"2564907","event_id":"600967","slug":"spx-opens-up-or-down-on-june-17-2026","question":"S&P 500 (SPX) Opens Up or Down on June 17?","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 17 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 17 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":[0.715,0.285],"probability":0.715,"spread":0.01,"active":true,"closed":false,"start_date":"2026-06-16T12:06:58.372792Z","end_date":"2026-06-17T20:00:00Z","closed_time":null,"volume":3884.0495680000004,"volume_24hr":3884.0495679999995,"prob_24h_change":0.21499999999999997,"volume_24h_change":3848.6485699999994,"normalized_vol_24hr":24.375179290771484,"normalized_volume":20.041141510009766,"liquidity":2000.1492,"categories":["Finance"],"countries":[],"updated_at":"2026-06-17T03:55:33.839489Z","fetched_at":"2026-06-17T03:54:41.396044Z","added_at":"2026-06-16T12:19:25.724143Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-june-17-2026/spx-opens-up-or-down-on-june-17-2026","event_title":"S&P 500 (SPX) Opens Up or Down on June 17?","chart_24h":[0.5,0.5,0.51,0.5,0.545,0.55,0.545,0.545,0.55,0.54,0.545,0.55,0.54,0.53,0.525,0.56,0.56,0.56,0.635,0.655,0.665,0.665]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/polymarket/600967","as_of":"2026-06-17T04:00:41.884074Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Polymarket): \"S&P 500 (SPX) Opens Up or Down on June 17?\" — top market at 72% probability across 1 outcome","source_url":null}}