{"schema_version":"secwatch.filing_event.v1","accession":"0001076598-25-000342","form_type":"8-K","ticker":"ETV","cik":"0001322436","company_name":"Eaton Vance Tax-Managed Buy-Write Opportunities Fund","filed_at":"2025-08-14T23:59:59+00:00","discovered_at":"2026-05-14T18:02:43.654477+00:00","generated_at":"2026-05-17T12:54:19.818678+00:00","sec_items":["8.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"Chairperson Mark R. Fetting passes away; Susan J. Sutherland named acting chair","bullets":["Mark R. Fetting, Chairperson of the Board, unexpectedly died on August 9, 2025.","Susan J. Sutherland appointed acting Chairperson of the Board effective August 9, 2025.","Board size reduced from ten to nine members effective August 12, 2025."],"urls":{"canonical":"https://secwatch.observer/filing/0001076598-25-000342","json":"https://secwatch.observer/filing/0001076598-25-000342.json","markdown":"https://secwatch.observer/filing/0001076598-25-000342.md","text":"https://secwatch.observer/filing/0001076598-25-000342.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1322436/000107659825000342/0001076598-25-000342-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1322436/000107659825000342/etv8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T12:54:19.818678+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}