{"source":"kalshi","id":"KXATPNATWINNER-26USOUSA","ticker":"KXATPNATWINNER-26USOUSA","slug":"KXATPNATWINNER-26USOUSA","title":"American to win the 2026 US Open?","description":null,"image":null,"icon":null,"active":true,"closed":false,"start_date":"2026-09-01T00:40:00Z","end_date":"2026-09-29T05:00:00Z","closed_time":null,"volume":1814.53,"volume_24hr":1318.9,"volume_24h_change":null,"normalized_vol_24hr":17.738786697387695,"normalized_volume":15.339686393737793,"liquidity":null,"open_interest":1602.49,"categories":["Sports"],"tags":[],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"American man or woman to win US Open","top_outcome_probability":0.46,"top_outcome_prob_24h_change":0.08000000000000002,"top_outcome_volume_24h_change":775.39,"updated_at":"2026-09-03T00:43:32.495675Z","fetched_at":"2026-09-03T00:43:32.495675Z","added_at":"2026-09-01T00:47:22.154368Z","url":"https://kalshi.com/markets/kxatpnatwinner/american-to-win-the-2026-us-open/kxatpnatwinner-26usousa","chart_24h":[475.44000000000005,498.13,505.36,517.88,523.57,649.6700000000001,618.8900000000001,608.8900000000001,606.85,206.85,204.4,206.92,203.77,1238.93,1228.93,1318.9],"kind":"live","markets":[{"source":"kalshi","id":"KXATPNATWINNER-26USOUSA-ANY","event_id":"KXATPNATWINNER-26USOUSA","slug":"KXATPNATWINNER-26USOUSA-ANY","question":"American Man or Woman to Win US Open","group_item_title":"American man or woman to win US Open","description":"If an American man or woman wins either the men's or women's singles title in the 2026 US Open tennis tournament, then the market resolves to Yes.\n\n---\n\nThe players’ nationalities reflect those designated by the Governing League.\n\nKalshi is not affiliated, associated, authorized, endorsed by, or in any way officially connected with the Governing League. 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All trademarks, logos, and brand names are the property of their respective owners.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.21,0.79],"probability":0.21,"spread":0.07999999999999999,"active":true,"closed":false,"start_date":"2026-09-01T00:40:00Z","end_date":"2026-09-29T05:00:00Z","closed_time":"2026-09-29T05:00:00Z","volume":118.18,"volume_24hr":77.4,"prob_24h_change":-0.1,"volume_24h_change":36.620000000000005,"normalized_vol_24hr":7.073591232299805,"normalized_volume":7.114601135253906,"liquidity":null,"categories":["Sports"],"countries":[],"updated_at":"2026-09-03T00:43:32.672488Z","fetched_at":"2026-09-03T00:43:32.672488Z","added_at":"2026-09-01T00:47:22.254609Z","url":"https://kalshi.com/markets/kxatpnatwinner/american-to-win-the-2026-us-open/kxatpnatwinner-26usousa","event_title":"American to win the 2026 US Open?","chart_24h":[0.31,0.31,0.31,0.13,0.13,0.13,0.13,0.13,0.13,0.21]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/kalshi/KXATPNATWINNER-26USOUSA","as_of":"2026-09-03T02:58:23.023837Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Kalshi): \"American to win the 2026 US Open?\" — top market at 46% probability across 3 outcomes","source_url":null}}