{"@context":{"@vocab":"https://schema.org/"},"@type":"ItemList","_source":{"data_provider":"AI Analytics","data_provider_url":"https://api.ai-analytics.org","license":"https://creativecommons.org/publicdomain/zero/1.0/","primary_source":"https://www.sec.gov/data/foiadocsfailsdatahtm","primary_source_dataset":"SEC CNS Fails-to-Deliver","generated_at":"2026-07-01T19:51:50.514Z"},"query":"MUB","count":1,"items":[{"cusip":"464288414","symbol":"MUB","issuer_name":"ISHARES NATIONAL MUNI BOND ETF","total_fail_shares":20205292,"peak_fail_shares":940783,"peak_date":"2026-03-25","days_with_fails":195,"window":["2025-06-04","2026-05-29"],"url":"https://api.ai-analytics.org/fails-to-deliver/464288414"}]}