{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-21-109808","form_type":"8-K","ticker":"CHI","cik":"0001171471","company_name":"CALAMOS CONVERTIBLE OPPORTUNITIES & INCOME FUND","filed_at":"2021-08-26T23:59:59+00:00","discovered_at":"2026-05-14T18:04:17.356570+00:00","generated_at":"2026-06-29T07:28:56.893103+00:00","sec_items":["5.03","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.1,"calibrated_materiality_score":0.1,"confidence":"low","headline":"Calamos Convertible Opportunities and Income Fund amends governing documents to clarify preferred securities provisions","bullets":["Board of Trustees amended Declaration of Trust and Bylaws, effective August 23, 2021.","Amendments clarify provisions relating to preferred securities.","No changes to fiscal year or other significant governance matters."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-21-109808","json":"https://secwatch.observer/filing/0001104659-21-109808.json","markdown":"https://secwatch.observer/filing/0001104659-21-109808.md","text":"https://secwatch.observer/filing/0001104659-21-109808.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1171471/000110465921109808/0001104659-21-109808-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1171471/000110465921109808/tm2122382d2_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-29T07:28:56.893103+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"}