{"source":"polymarket","id":"676588","ticker":"spx-opens-up-or-down-on-july-8-2026","slug":"spx-opens-up-or-down-on-july-8-2026","title":"S&P 500 (SPX) Opens Up or Down on July 8?","description":"This market will resolve to \"Up\" if the official S&P 500 Index open price for S&P 500 (SPX) on July 8 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 July 8 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":"2026-07-07T12:00:17Z","end_date":"2026-07-08T20:00:00Z","closed_time":null,"volume":63884.75441900001,"volume_24hr":61878.587754,"volume_24h_change":null,"normalized_vol_24hr":39.48622512817383,"normalized_volume":24.986433029174805,"liquidity":63451.43096,"open_interest":31938.678612,"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":0.0005,"top_outcome_prob_24h_change":-0.4545,"top_outcome_volume_24h_change":59872.421089,"updated_at":"2026-07-08T20:06:27.134086Z","fetched_at":"2026-07-08T20:06:27.134086Z","added_at":"2026-07-07T12:18:58.576570Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-july-8-2026","chart_24h":[2006.166665,2123.506665,2828.496665,3904.879997,5172.766646,5988.226646,6514.662766,7072.39233,7369.8523270000005,7684.598087,8783.531691,9306.845273,10140.894757,11530.82397,12582.148084999999,14420.279523,17626.053024999997,22732.368690999996,22872.325801999996,24981.898633999997,24996.898633999997,27444.933641999996,33373.353641999995,38219.322642,56636.104418999996,61884.754419,61884.754419,61884.754419,61884.754419,61884.754419,61884.754419,61884.754419,61878.587754],"markets":[{"source":"polymarket","id":"2830279","event_id":"676588","slug":"spx-opens-up-or-down-on-july-8-2026","question":"S&P 500 (SPX) Opens Up or Down on July 8?","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 July 8 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 July 8 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":[0.0005,0.9995],"probability":0.0005,"spread":0.001,"active":true,"closed":false,"start_date":"2026-07-07T12:00:17Z","end_date":"2026-07-08T20:00:00Z","closed_time":null,"volume":63884.75441900001,"volume_24hr":61878.587754,"prob_24h_change":-0.4545,"volume_24h_change":59872.421089,"normalized_vol_24hr":39.99162673950195,"normalized_volume":34.340415954589844,"liquidity":60769.83046,"categories":["Finance"],"countries":[],"updated_at":"2026-07-08T19:52:06.573656Z","fetched_at":"2026-07-08T19:21:56.494492Z","added_at":"2026-07-07T12:18:58.650809Z","url":"https://polymarket.com/event/spx-opens-up-or-down-on-july-8-2026/spx-opens-up-or-down-on-july-8-2026","event_title":"S&P 500 (SPX) Opens Up or Down on July 8?","chart_24h":[0.5,0.34,0.395,0.45,0.44,0.465,0.565,0.54,0.465,0.57,0.53,0.485,0.395,0.33,0.26,0.305,0.0245,0.006,0.006,0.017,0.006,0.0305,0.015,0.004,0.0005,0.0005,0.0005,0.0005,0.0005,0.0005]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/polymarket/676588","as_of":"2026-07-08T20:14:24.965444Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Polymarket): \"S&P 500 (SPX) Opens Up or Down on July 8?\" — top market at 0% probability across 1 outcome","source_url":null}}