{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31","ticker":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31","title":"Boston Calling Music Festival 2027: Headliners","description":null,"image":null,"icon":null,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":null,"volume":698.69,"volume_24hr":698.69,"volume_24h_change":null,"normalized_vol_24hr":15.930819511413574,"normalized_volume":11.374648094177246,"liquidity":null,"open_interest":455.31,"categories":["Culture"],"tags":[],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"Glass Animals","top_outcome_probability":0.26,"top_outcome_prob_24h_change":0.26,"top_outcome_volume_24h_change":621.69,"updated_at":"2026-08-25T05:56:23.471274Z","fetched_at":"2026-08-25T05:56:23.471274Z","added_at":"2026-08-19T00:23:12.503991Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","chart_24h":null,"markets":[{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-GLA","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-GLA","question":"Will Glass Animals be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Glass Animals","description":"If Glass Animals is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.26,0.74],"probability":0.26,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":621.69,"volume_24hr":621.69,"prob_24h_change":0.26,"volume_24h_change":621.69,"normalized_vol_24hr":16.90030288696289,"normalized_volume":12.886889457702637,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T03:14:28.506210Z","fetched_at":"2026-08-25T03:14:28.506210Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.26,0.26]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-CAG","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-CAG","question":"Will Cage the Elephant be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Cage the Elephant","description":"If Cage the Elephant is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.16,0.84],"probability":0.16,"spread":0.020000000000000018,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":36.0,"volume_24hr":36.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-KAC","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-KAC","question":"Will Kacey Musgraves be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Kacey Musgraves","description":"If Kacey Musgraves is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.15,0.85],"probability":0.15,"spread":0.01999999999999999,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":41.0,"volume_24hr":41.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-BIL","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-BIL","question":"Will Billie Eilish be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Billie Eilish","description":"If Billie Eilish is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T05:36:56.556392Z","fetched_at":"2026-08-25T05:36:56.556392Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-BLA","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-BLA","question":"Will The Black Keys be a headliner at Boston Calling Music Festival 2027?","group_item_title":"The Black Keys","description":"If The Black Keys is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-BLI","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-BLI","question":"Will Blink-182 be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Blink-182","description":"If Blink-182 is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-BOY","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-BOY","question":"Will Boygenius be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Boygenius","description":"If Boygenius is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.01999999999999999,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-CHA","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-CHA","question":"Will Chappell Roan be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Chappell Roan","description":"If Chappell Roan is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.020000000000000018,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T04:34:28.011730Z","fetched_at":"2026-08-25T04:34:28.011730Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-DUA","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-DUA","question":"Will Dua Lipa be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Dua Lipa","description":"If Dua Lipa is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.06,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T05:36:56.556392Z","fetched_at":"2026-08-25T05:36:56.556392Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-FAL","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-FAL","question":"Will Fall Out Boy be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Fall Out Boy","description":"If Fall Out Boy is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.03,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-GRE","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-GRE","question":"Will Green Day be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Green Day","description":"If Green Day is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.03,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-JAC","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-JAC","question":"Will Jack Harlow be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Jack Harlow","description":"If Jack Harlow is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-KEN","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-KEN","question":"Will Kendrick Lamar be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Kendrick Lamar","description":"If Kendrick Lamar is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.01999999999999999,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T04:34:28.011730Z","fetched_at":"2026-08-25T04:34:28.011730Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-LAN","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-LAN","question":"Will Lana Del Rey be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Lana Del Rey","description":"If Lana Del Rey is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.01999999999999999,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T04:34:28.011730Z","fetched_at":"2026-08-25T04:34:28.011730Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-LOR","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-LOR","question":"Will Lorde be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Lorde","description":"If Lorde is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.03,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T04:34:28.011730Z","fetched_at":"2026-08-25T04:34:28.011730Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-LUK","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-LUK","question":"Will Luke Combs be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Luke Combs","description":"If Luke Combs is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.03,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-LUM","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-LUM","question":"Will The Lumineers be a headliner at Boston Calling Music Festival 2027?","group_item_title":"The Lumineers","description":"If The Lumineers is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-MYC","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-MYC","question":"Will My Chemical Romance be a headliner at Boston Calling Music Festival 2027?","group_item_title":"My Chemical Romance","description":"If My Chemical Romance is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.01999999999999999,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T04:34:28.011730Z","fetched_at":"2026-08-25T04:34:28.011730Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-NOA","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-NOA","question":"Will Noah Kahan be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Noah Kahan","description":"If Noah Kahan is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.01999999999999999,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T04:34:28.011730Z","fetched_at":"2026-08-25T04:34:28.011730Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-PAR","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-PAR","question":"Will Paramore be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Paramore","description":"If Paramore is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.05000000000000002,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T05:36:56.556392Z","fetched_at":"2026-08-25T05:36:56.556392Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-PEA","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-PEA","question":"Will Pearl Jam be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Pearl Jam","description":"If Pearl Jam is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.020000000000000018,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T04:34:28.011730Z","fetched_at":"2026-08-25T04:34:28.011730Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-POS","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-POS","question":"Will Post Malone be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Post Malone","description":"If Post Malone is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.020000000000000018,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T04:34:28.011730Z","fetched_at":"2026-08-25T04:34:28.011730Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-SAB","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-SAB","question":"Will Sabrina Carpenter be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Sabrina Carpenter","description":"If Sabrina Carpenter is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.01999999999999999,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T04:34:28.011730Z","fetched_at":"2026-08-25T04:34:28.011730Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-STR","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-STR","question":"Will The Strokes be a headliner at Boston Calling Music Festival 2027?","group_item_title":"The Strokes","description":"If The Strokes is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-SZA","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-SZA","question":"Will SZA be a headliner at Boston Calling Music Festival 2027?","group_item_title":"SZA","description":"If SZA is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.04999999999999999,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-TRA","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-TRA","question":"Will Travis Scott be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Travis Scott","description":"If Travis Scott is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.020000000000000018,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T04:12:29.549511Z","fetched_at":"2026-08-25T04:12:29.549511Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-TYL","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-TYL","question":"Will Tyler, The Creator be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Tyler, The Creator","description":"If Tyler, The Creator is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.01999999999999999,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T04:34:28.011730Z","fetched_at":"2026-08-25T04:34:28.011730Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-TYLE","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-TYLE","question":"Will Tyler Childers be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Tyler Childers","description":"If Tyler Childers is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-VAM","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-VAM","question":"Will Vampire Weekend be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Vampire Weekend","description":"If Vampire Weekend is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":["United States"],"updated_at":"2026-08-25T05:56:23.695038Z","fetched_at":"2026-08-25T05:56:23.695038Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0]},{"source":"kalshi","id":"KXHEADLINE-BOS27DEC31-ZAC","event_id":"KXHEADLINE-BOS27DEC31","slug":"KXHEADLINE-BOS27DEC31-ZAC","question":"Will Zach Bryan be a headliner at Boston Calling Music Festival 2027?","group_item_title":"Zach Bryan","description":"If Zach Bryan is the a headliner at Boston Calling Music Festival 2027, then the market resolves to Yes.\n\n---\n\nTo fulfill the Payout Criterion, the specified person must actually appear and carry out the specified role at the event. Being listed in the official lineup without actually performing does not qualify. Joint performances where the person shares the role with another performer do count. The performance qualifies even if delayed, shortened, or modified in format. Pre-recorded content does not qualify unless explicitly designated by organizers as fulfilling the role. Rumored or unofficial announcements, canceled appearances, and performances in different roles than specified do not satisfy the criterion.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.01999999999999999,"active":true,"closed":false,"start_date":"2026-08-19T00:10:00Z","end_date":"2028-12-30T15:00:00Z","closed_time":"2027-12-31T04:59:00Z","volume":0.0,"volume_24hr":0.0,"prob_24h_change":0.0,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Culture"],"countries":[],"updated_at":"2026-08-25T04:34:28.011730Z","fetched_at":"2026-08-25T04:34:28.011730Z","added_at":"2026-08-19T00:23:13.128959Z","url":"https://kalshi.com/markets/kxheadline/boston-calling-music-festival-2027-headliners/kxheadline-bos27dec31","event_title":"Boston Calling Music Festival 2027: Headliners","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/kalshi/KXHEADLINE-BOS27DEC31","as_of":"2026-08-25T05:57:49.757301Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Kalshi): \"Boston Calling Music Festival 2027: Headliners\" — top market at 26% probability across 30 outcomes","source_url":null}}