{"source":"kalshi","id":"KXUSCPIYEAR-29FEB01","ticker":"KXUSCPIYEAR-29FEB01","slug":"KXUSCPIYEAR-29FEB01","title":"US headline CPI inflation in December 2028","description":null,"image":null,"icon":null,"active":true,"closed":false,"start_date":"2026-07-29T23:00:00Z","end_date":"2029-02-08T06:30:00Z","closed_time":null,"volume":8126.54,"volume_24hr":0.0,"volume_24h_change":null,"normalized_vol_24hr":null,"normalized_volume":21.980791091918945,"liquidity":null,"open_interest":1746.8999999999999,"categories":["Economy"],"tags":[],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"Above 0.0%","top_outcome_probability":0.94,"top_outcome_prob_24h_change":null,"top_outcome_volume_24h_change":null,"updated_at":"2026-09-04T13:55:02.083079Z","fetched_at":"2026-09-04T13:55:02.083079Z","added_at":"2026-07-29T23:05:54.790553Z","url":"https://kalshi.com/markets/kxuscpiyear/us-headline-cpi-inflation-in-december-2028/kxuscpiyear-29feb01","chart_24h":null,"kind":"live","markets":[{"source":"kalshi","id":"KXUSCPIYEAR-29FEB01-T0.0","event_id":"KXUSCPIYEAR-29FEB01","slug":"KXUSCPIYEAR-29FEB01-T0.0","question":"Will the 12-month percentage change in CPI-U in December 2028 be above 0.0%?","group_item_title":"Above 0.0%","description":"If the 12-month percentage change in CPI-U, U.S. city average, all items, not seasonally adjusted, in December 2028 is above 0.0%, then the market resolves to Yes.\n\n---\n\nThe initially reported value for December 2028 will be used. 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