{"source":"polymarket","id":"572456","ticker":"spx-opens-up-or-down-on-june-9-2026","slug":"spx-opens-up-or-down-on-june-9-2026","title":"S&P 500 (SPX) Opens Up or Down on June 9?","description":"This market will resolve to \"Up\" if the official S&P 500 Index open price for S&P 500 (SPX) on June 9 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 9 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":false,"closed":true,"start_date":"2026-06-08T12:09:07.408901Z","end_date":"2026-06-09T20:00:00Z","closed_time":"2026-06-09T22:31:30Z","volume":87404.92823799998,"volume_24hr":85302.05573900002,"volume_24h_change":null,"normalized_vol_24hr":52.06136703491211,"normalized_volume":28.428558349609375,"liquidity":0.0,"open_interest":42840.340813,"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"},{"id":"104181","slug":"rewards-automation-400-4pt5-50-1","label":"Rewards Automation 400, 4.5, 50 (1)"}],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"","top_outcome_probability":1.0,"top_outcome_prob_24h_change":0.04500000000000004,"top_outcome_volume_24h_change":52014.41974600003,"updated_at":"2026-06-09T22:39:26.293025Z","fetched_at":"2026-06-09T22:39:26.293025Z","added_at":"2026-06-08T12:10:24.285731Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-june-9-2026","chart_24h":[30468.394668999987,35557.37152599999,38328.46081399999,38910.91096899999,41616.62029599999,47901.251924,60196.098238000006,67431.64823800001,68576.89823800001,79621.35823800002,84603.08823800001,84603.08823800001,85107.05823800001,85255.86823800001,85255.86823800001,87216.71601800002,86761.30606000003,86751.30606000003,85302.05573900002],"markets":[{"source":"polymarket","id":"2469689","event_id":"572456","slug":"spx-opens-up-or-down-on-june-9-2026","question":"S&P 500 (SPX) Opens Up or Down on June 9?","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 9 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 9 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":[1.0,0.0],"probability":1.0,"spread":0.001,"active":false,"closed":true,"start_date":"2026-06-08T12:02:19.157378Z","end_date":"2026-06-09T20:00:00Z","closed_time":"2026-06-09T22:31:30Z","volume":87404.92823799998,"volume_24hr":85302.05573900002,"prob_24h_change":0.04500000000000004,"volume_24h_change":52014.41974600003,"normalized_vol_24hr":53.532745361328125,"normalized_volume":33.20927429199219,"liquidity":0.0,"categories":["Finance"],"countries":[],"updated_at":"2026-06-10T09:04:05.080370Z","fetched_at":"2026-06-09T22:39:26.379658Z","added_at":"2026-06-08T12:10:24.384001Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-june-9-2026/spx-opens-up-or-down-on-june-9-2026","event_title":"S&P 500 (SPX) Opens Up or Down on June 9?","chart_24h":[0.955,0.93,0.955,0.9645,0.979,0.9995,0.9995,0.9995,0.9995,0.9995,0.9995,0.9995,0.9995,0.9995,0.9995,0.9995,0.9995,0.9995,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/polymarket/572456","as_of":"2026-06-10T09:10:15.687551Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Polymarket): \"S&P 500 (SPX) Opens Up or Down on June 9?\" — top market at 100% probability across 1 outcome","source_url":null}}