{"source":"polymarket","id":"597397","ticker":"spx-opens-up-or-down-on-june-16-2026","slug":"spx-opens-up-or-down-on-june-16-2026","title":"S&P 500 (SPX) Opens Up or Down on June 16?","description":"This market will resolve to \"Up\" if the official S&P 500 Index open price for S&P 500 (SPX) on June 16 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 16 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":"2026-06-15T12:14:55.584234Z","end_date":"2026-06-16T20:00:00Z","closed_time":null,"volume":28171.022497999995,"volume_24hr":28171.022498000002,"volume_24h_change":null,"normalized_vol_24hr":31.84947395324707,"normalized_volume":22.483182907104492,"liquidity":2457.5831,"open_interest":11852.305798,"categories":["Finance"],"tags":[{"id":"102127","slug":"up-or-down","label":"Up or Down"},{"id":"102281","slug":"daily","label":"Daily"},{"id":"120","slug":"finance","label":"Finance"},{"id":"102683","slug":"spx","label":"SPX"},{"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":0.465,"top_outcome_prob_24h_change":-0.034999999999999976,"top_outcome_volume_24h_change":32173.886738,"updated_at":"2026-06-16T09:05:53.791298Z","fetched_at":"2026-06-16T09:05:53.791298Z","added_at":"2026-06-15T12:11:53.809482Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-june-16-2026","chart_24h":[0.0,0.0,0.0,1.11111,12.22222,12.22222,12.22222,12.22222,12.22222,20.44695,20.44695,181.61361499999998,242.83810299999996,580.4628369999999,640.4628369999999,705.2667569999999,2134.807394,2257.632067,2678.572067,2890.60745,3449.9190700000004,3520.585207,3554.415207,5036.432155,15704.592155,15960.892155,16358.893266000001,17127.489628,17265.653146999997,19140.256316999996,20600.370013],"markets":[{"source":"polymarket","id":"2551869","event_id":"597397","slug":"spx-opens-up-or-down-on-june-16-2026","question":"S&P 500 (SPX) Opens Up or Down on June 16?","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 16 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 16 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":[0.465,0.535],"probability":0.465,"spread":0.01,"active":true,"closed":false,"start_date":"2026-06-15T12:02:29.241694Z","end_date":"2026-06-16T20:00:00Z","closed_time":null,"volume":32173.886737999994,"volume_24hr":32173.886738,"prob_24h_change":-0.034999999999999976,"volume_24h_change":32173.886738,"normalized_vol_24hr":36.49984359741211,"normalized_volume":31.60489273071289,"liquidity":1977.1086,"categories":["Finance"],"countries":[],"updated_at":"2026-06-16T09:06:56.438425Z","fetched_at":"2026-06-16T09:05:53.964800Z","added_at":"2026-06-15T12:11:53.863724Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-june-16-2026/spx-opens-up-or-down-on-june-16-2026","event_title":"S&P 500 (SPX) Opens Up or Down on June 16?","chart_24h":[0.5,0.495,0.5,0.495,0.51,0.505,0.5,0.5,0.495,0.505,0.505,0.525,0.505,0.515,0.495,0.455,0.465,0.485,0.425,0.425,0.425,0.41,0.42,0.41,0.455,0.38,0.425,0.465,0.445,0.445]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/polymarket/597397","as_of":"2026-06-16T09:09:24.195642Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Polymarket): \"S&P 500 (SPX) Opens Up or Down on June 16?\" — top market at 46% probability across 1 outcome","source_url":null}}