{"apiVersion":"2","symbol":"CME","stocks":{"found":true,"source":"v2-published-stock-files","lastDate":"2026-10-01","scope":"daily-file-boundaries","records":[{"file":"CME_day.csv","name":"CME Group Inc.","type":"CS","active":true,"delistDate":null,"firstDate":"2003-10-01","lastDate":"2026-10-01","coverage":"2003-10-01 / 2026-10-01","sizeDayBytes":692543,"sizeMinuteBytes":236932202}],"note":"Dates are the first and last rows of each daily file, not a completeness guarantee or minute-bar date range. Minute size is null when no matching file is published. Identity boundaries can be incomplete; a missing symbol is not proof of no historical trading."}}