{"source":"kalshi","id":"KXWTADOUBLES-26AUG15KOSSTEWILWIL","ticker":"KXWTADOUBLES-26AUG15KOSSTEWILWIL","slug":"KXWTADOUBLES-26AUG15KOSSTEWILWIL","title":"Kostyuk / Stearns vs Williams / Williams","description":null,"image":null,"icon":null,"active":true,"closed":false,"start_date":"2026-08-14T20:15:00Z","end_date":"2026-08-29T14:00:00Z","closed_time":null,"volume":10635.189999999999,"volume_24hr":9920.75,"volume_24h_change":null,"normalized_vol_24hr":30.537078857421875,"normalized_volume":23.76052474975586,"liquidity":null,"open_interest":9225.27,"categories":["Sports"],"tags":[],"synthetic":false,"is_group":false,"group_key":"26AUG15KOSSTEWILWIL","parent_event_id":null,"probability":null,"spread":null,"top_outcome":"Marta Kostyuk / Peyton Stearns","top_outcome_probability":0.7,"top_outcome_prob_24h_change":0.019999999999999907,"top_outcome_volume_24h_change":4484.57,"updated_at":"2026-08-17T20:48:35.022695Z","fetched_at":"2026-08-17T20:48:35.022695Z","added_at":"2026-08-14T20:33:58.985678Z","url":"https://kalshi.com/markets/kxwtadoubles/kostyuk-stearns-vs-williams-williams/kxwtadoubles-26aug15kosstewilwil","chart_24h":[490.02,488.59000000000003,496.76,498.05999999999995,483.75,481.49,484.47,521.9300000000001,639.8900000000001,623.51,786.22,785.63,785.85,752.96,765.9200000000001,777.9200000000001,797.78,798.56,804.34,824.4200000000001,914.99,898.12,1026.23,1481.63,2319.91,2537.2799999999997,2620.62,8993.04],"markets":[{"source":"kalshi","id":"KXWTADOUBLES-26AUG15KOSSTEWILWIL-KOSSTE","event_id":"KXWTADOUBLES-26AUG15KOSSTEWILWIL","slug":"KXWTADOUBLES-26AUG15KOSSTEWILWIL-KOSSTE","question":"Will Marta Kostyuk / Peyton Stearns win the Kostyuk / Stearns vs Williams / Williams: Round Of 32 match?","group_item_title":"Marta Kostyuk / Peyton Stearns","description":"If Marta Kostyuk / Peyton Stearns wins the Kostyuk / Stearns vs Williams / Williams professional tennis match in the 2026 WTA Cincinnati Round Of 32 after a ball has been played, then the market resolves to Yes.\n\n---\n\nThe following market refers to the Kostyuk / Stearns vs Williams / Williams professional tennis match in the 2026 WTA Cincinnati Round Of 32 after a ball has been played. If the match does not occur (signaled by a ball being played) due to a player injury, walkover, forfeiture, or any other cancellation (all before the match starts), the market will resolve to a fair price in accordance with the rules. If this match is postponed or delayed, the market will remain open and close after the rescheduled match has finished (within two weeks).\n\nKalshi is not affiliated, associated, authorized, endorsed by, or in any way officially connected with the Governing League. All trademarks, logos, and brand names are the property of their respective owners.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.7,0.30000000000000004],"probability":0.7,"spread":0.009999999999999898,"active":true,"closed":false,"start_date":"2026-08-14T20:15:00Z","end_date":"2026-08-29T14:00:00Z","closed_time":"2026-08-29T14:00:00Z","volume":5012.04,"volume_24hr":4747.74,"prob_24h_change":0.019999999999999907,"volume_24h_change":4484.57,"normalized_vol_24hr":27.98424530029297,"normalized_volume":22.596332550048828,"liquidity":null,"categories":["Sports"],"countries":[],"updated_at":"2026-08-17T20:49:22.544729Z","fetched_at":"2026-08-17T20:48:35.183320Z","added_at":"2026-08-14T20:33:59.302180Z","url":"https://kalshi.com/markets/kxwtadoubles/kostyuk-stearns-vs-williams-williams/kxwtadoubles-26aug15kosstewilwil","event_title":"Kostyuk / Stearns vs Williams / Williams","chart_24h":[0.68,0.68,0.68,0.68,0.68,0.68,0.68,0.68,0.86,0.8,0.55,0.83,0.83,0.83,0.88,0.89,0.89,0.89,0.89,0.89,0.89,0.89,0.89,0.89,0.89,0.89,0.64,0.7,0.72,0.72,0.72,0.72,0.72,0.72,0.7]},{"source":"kalshi","id":"KXWTADOUBLES-26AUG15KOSSTEWILWIL-WILWIL","event_id":"KXWTADOUBLES-26AUG15KOSSTEWILWIL","slug":"KXWTADOUBLES-26AUG15KOSSTEWILWIL-WILWIL","question":"Will Serena Williams / Venus Williams win the Kostyuk / Stearns vs Williams / Williams: Round Of 32 match?","group_item_title":"Serena Williams / Venus Williams","description":"If Serena Williams / Venus Williams wins the Kostyuk / Stearns vs Williams / Williams professional tennis match in the 2026 WTA Cincinnati Round Of 32 after a ball has been played, then the market resolves to Yes.\n\n---\n\nThe following market refers to the Kostyuk / Stearns vs Williams / Williams professional tennis match in the 2026 WTA Cincinnati Round Of 32 after a ball has been played. If the match does not occur (signaled by a ball being played) due to a player injury, walkover, forfeiture, or any other cancellation (all before the match starts), the market will resolve to a fair price in accordance with the rules. If this match is postponed or delayed, the market will remain open and close after the rescheduled match has finished (within two weeks).\n\nKalshi is not affiliated, associated, authorized, endorsed by, or in any way officially connected with the Governing League. All trademarks, logos, and brand names are the property of their respective owners.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.3,0.7],"probability":0.3,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-08-14T20:15:00Z","end_date":"2026-08-29T14:00:00Z","closed_time":"2026-08-29T14:00:00Z","volume":5623.15,"volume_24hr":5173.01,"prob_24h_change":-0.10000000000000003,"volume_24h_change":4946.16,"normalized_vol_24hr":28.554157257080078,"normalized_volume":23.21060562133789,"liquidity":null,"categories":["Sports"],"countries":[],"updated_at":"2026-08-17T20:49:22.544729Z","fetched_at":"2026-08-17T20:48:35.183320Z","added_at":"2026-08-14T20:33:59.302180Z","url":"https://kalshi.com/markets/kxwtadoubles/kostyuk-stearns-vs-williams-williams/kxwtadoubles-26aug15kosstewilwil","event_title":"Kostyuk / Stearns vs Williams / Williams","chart_24h":[0.4,0.4,0.4,0.4,0.4,0.6,0.6,0.6,0.24,0.26,0.6,0.2,0.6,0.59,0.24,0.24,0.24,0.39,0.39,0.39,0.39,0.36,0.36,0.36,0.39,0.21,0.36,0.4,0.3,0.3,0.3,0.29,0.3,0.3,0.3,0.3]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/kalshi/KXWTADOUBLES-26AUG15KOSSTEWILWIL","as_of":"2026-08-17T20:59:31.721059Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Kalshi): \"Kostyuk / Stearns vs Williams / Williams\" — top market at 30% probability across 2 outcomes","source_url":null}}