{"source":"kalshi","id":"KXINXDUD-26SEP18H1600","ticker":"KXINXDUD-26SEP18H1600","slug":"KXINXDUD-26SEP18H1600","title":"S&P 500 Daily Up/Down","description":null,"image":null,"icon":null,"active":true,"closed":false,"start_date":"2026-09-18T00:00:00Z","end_date":"2026-09-25T23:00:00Z","closed_time":null,"volume":1507.3,"volume_24hr":1507.3,"volume_24h_change":null,"normalized_vol_24hr":17.285160064697266,"normalized_volume":14.513811111450195,"liquidity":null,"open_interest":1240.13,"categories":["Finance"],"tags":[],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"Above 7637.71","top_outcome_probability":0.76,"top_outcome_prob_24h_change":0.76,"top_outcome_volume_24h_change":1507.3,"updated_at":"2026-09-18T08:24:20.495678Z","fetched_at":"2026-09-18T08:24:20.495678Z","added_at":"2026-09-18T00:25:49.066739Z","url":"https://kalshi.com/markets/kxinxdud/sp-500-daily-updown/kxinxdud-26sep18h1600","chart_24h":[0.0,18.26,74.04,142.36,175.76,698.65,1062.12,1197.58,1304.3,1404.3,1507.3],"kind":"live","markets":[{"source":"kalshi","id":"KXINXDUD-26SEP18H1600-T7637.71","event_id":"KXINXDUD-26SEP18H1600","slug":"KXINXDUD-26SEP18H1600-T7637.71","question":"Will the S&P 500 be above 7637.71 on Sep 18, 2026 at 4pm EDT?","group_item_title":"Above 7637.71","description":"If the end-of-day price of the S&P 500 on September 18, 2026 is above 7637.71, then the market resolves to Yes.\n\n---\n\nThe target value is the end-of-day/closing price of the prior week's close.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.76,0.24],"probability":0.76,"spread":0.06000000000000005,"active":true,"closed":false,"start_date":"2026-09-18T00:00:00Z","end_date":"2026-09-25T23:00:00Z","closed_time":"2026-09-18T20:00:00Z","volume":1507.3,"volume_24hr":1507.3,"prob_24h_change":0.76,"volume_24h_change":1507.3,"normalized_vol_24hr":18.088603973388672,"normalized_volume":16.674463272094727,"liquidity":null,"categories":["Finance"],"countries":[],"updated_at":"2026-09-18T09:10:58.833819Z","fetched_at":"2026-09-18T09:10:58.833819Z","added_at":"2026-09-18T00:25:49.200217Z","url":"https://kalshi.com/markets/kxinxdud/sp-500-daily-updown/kxinxdud-26sep18h1600","event_title":"S&P 500 Daily Up/Down","chart_24h":[0.0,0.0,0.53,0.53,0.53,0.51,0.57,0.63,0.65,0.68,0.72,0.74,0.74,0.76,0.76,0.76]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/kalshi/KXINXDUD-26SEP18H1600","as_of":"2026-09-18T09:16:40.316497Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Kalshi): \"S&P 500 Daily Up/Down\" — top market at 76% probability across 1 outcome","source_url":null}}