{"source":"kalshi","id":"KXWTASETWINNER-26AUG18KOSSTE-1","ticker":"KXWTASETWINNER-26AUG18KOSSTE-1","slug":"KXWTASETWINNER-26AUG18KOSSTE-1","title":"Marta Kostyuk vs Sloane Stephens: Set 1 Winner","description":null,"image":null,"icon":null,"active":false,"closed":true,"start_date":"2026-08-17T15:20:00Z","end_date":"2026-09-01T15:00:00Z","closed_time":"2026-08-18T20:05:57Z","volume":197663.12,"volume_24hr":197663.12,"volume_24h_change":null,"normalized_vol_24hr":51.52320861816406,"normalized_volume":41.037261962890625,"liquidity":null,"open_interest":149730.97,"categories":["Sports"],"tags":[],"synthetic":false,"is_group":false,"group_key":"26AUG18KOSSTE-1","parent_event_id":null,"probability":null,"spread":null,"top_outcome":"Marta Kostyuk","top_outcome_probability":0.99,"top_outcome_prob_24h_change":0.99,"top_outcome_volume_24h_change":129857.81,"updated_at":"2026-08-18T20:16:29.210851Z","fetched_at":"2026-08-18T20:16:29.210851Z","added_at":"2026-08-17T15:32:57.551326Z","url":"https://kalshi.com/markets/kxwtasetwinner/marta-kostyuk-vs-sloane-stephens-set-1-winner/kxwtasetwinner-26aug18kosste-1","chart_24h":[0.0,4.0,4.0,25.69,26.9,39.08,44.08,261.88,347.88,545.88,568.89,571.38,3226.4,5318.85,170462.99,197663.12],"markets":[{"source":"kalshi","id":"KXWTASETWINNER-26AUG18KOSSTE-1-KOS","event_id":"KXWTASETWINNER-26AUG18KOSSTE-1","slug":"KXWTASETWINNER-26AUG18KOSSTE-1-KOS","question":"Will Marta Kostyuk win set 1 in the Marta Kostyuk vs Sloane Stephens match","group_item_title":"Marta Kostyuk","description":"If Marta Kostyuk wins set 1 in the Marta Kostyuk vs Sloane Stephens professional tennis match in the 2026 WTA Cincinnati Round Of 32, then the market resolves to Yes.\n\n---\n\nThe following market refers to the Marta Kostyuk vs Sloane Stephens professional tennis match in the 2026 WTA Cincinnati Round Of 32. 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). If a retirement occurs, all markets that can be unconditionally settled based on play already completed will resolve accordingly. Any markets that cannot be unconditionally settled will resolve to Fair Market Price, as determined at the sole discretion of the Exchange.\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":[0.99,0.010000000000000009],"probability":0.99,"spread":1.0,"active":false,"closed":true,"start_date":"2026-08-17T15:20:00Z","end_date":"2026-09-01T15:00:00Z","closed_time":"2026-08-18T20:05:57Z","volume":129857.81,"volume_24hr":129857.81,"prob_24h_change":0.99,"volume_24h_change":129857.81,"normalized_vol_24hr":50.19396209716797,"normalized_volume":43.156124114990234,"liquidity":null,"categories":["Sports"],"countries":[],"updated_at":"2026-08-18T20:19:28.472038Z","fetched_at":"2026-08-18T20:16:29.223716Z","added_at":"2026-08-17T15:32:57.750729Z","url":"https://kalshi.com/markets/kxwtasetwinner/marta-kostyuk-vs-sloane-stephens-set-1-winner/kxwtasetwinner-26aug18kosste-1","event_title":"Marta Kostyuk vs Sloane Stephens: Set 1 Winner","chart_24h":[0.0,0.0,0.0,0.81,0.81,0.81,0.78,0.79,0.8,0.51,0.99,0.99]},{"source":"kalshi","id":"KXWTASETWINNER-26AUG18KOSSTE-1-STE","event_id":"KXWTASETWINNER-26AUG18KOSSTE-1","slug":"KXWTASETWINNER-26AUG18KOSSTE-1-STE","question":"Will Sloane Stephens win set 1 in the Marta Kostyuk vs Sloane Stephens match","group_item_title":"Sloane Stephens","description":"If Sloane Stephens wins set 1 in the Marta Kostyuk vs Sloane Stephens professional tennis match in the 2026 WTA Cincinnati Round Of 32, then the market resolves to Yes.\n\n---\n\nThe following market refers to the Marta Kostyuk vs Sloane Stephens professional tennis match in the 2026 WTA Cincinnati Round Of 32. 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). If a retirement occurs, all markets that can be unconditionally settled based on play already completed will resolve accordingly. Any markets that cannot be unconditionally settled will resolve to Fair Market Price, as determined at the sole discretion of the Exchange.\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":[0.01,0.99],"probability":0.01,"spread":1.0,"active":false,"closed":true,"start_date":"2026-08-17T15:20:00Z","end_date":"2026-09-01T15:00:00Z","closed_time":"2026-08-18T20:05:57Z","volume":67805.31,"volume_24hr":67805.31,"prob_24h_change":-0.22,"volume_24h_change":67805.31,"normalized_vol_24hr":44.80664825439453,"normalized_volume":38.5241813659668,"liquidity":null,"categories":["Sports"],"countries":[],"updated_at":"2026-08-18T23:43:52.106194Z","fetched_at":"2026-08-18T20:16:29.223716Z","added_at":"2026-08-17T15:32:57.750729Z","url":"https://kalshi.com/markets/kxwtasetwinner/marta-kostyuk-vs-sloane-stephens-set-1-winner/kxwtasetwinner-26aug18kosste-1","event_title":"Marta Kostyuk vs Sloane Stephens: Set 1 Winner","chart_24h":[0.23,0.23,0.23,0.23,0.23,0.21,0.21,0.19,0.19,0.2,0.2,0.2,0.21,0.21,0.21,0.21,0.4,0.01,0.01]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/kalshi/KXWTASETWINNER-26AUG18KOSSTE-1","as_of":"2026-08-18T23:45:59.806932Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Kalshi): \"Marta Kostyuk vs Sloane Stephens: Set 1 Winner\" — top market at 99% probability across 2 outcomes","source_url":null}}