{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-22-028546","form_type":"8-K","ticker":"ETCG","cik":"0001705181","company_name":"Grayscale Ethereum Classic Trust (ETC)","filed_at":"2022-02-04T23:59:59+00:00","discovered_at":"2026-05-14T18:04:07.880597+00:00","generated_at":"2026-06-27T11:08:08.340541+00:00","sec_items":["1.01","1.02","8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"ETCG switches to simpler index price calculation for ETC valuation","bullets":["Effective Feb 1, 2022, Trust uses Index Price without prior additional averaging mechanism; aims for greater transparency.","Average historical difference between old and new index prices was 0.08% for period 2019–2021.","New Index License Agreement with CoinDesk Indices executed; prior 2019 agreement terminated.","Index constituent exchanges and fallback pricing hierarchy remain unchanged.","GAAP NAV continues using Coinbase Pro price; Index Price is non-GAAP and not used in financial statements."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-22-028546","json":"https://secwatch.observer/filing/0001193125-22-028546.json","markdown":"https://secwatch.observer/filing/0001193125-22-028546.md","text":"https://secwatch.observer/filing/0001193125-22-028546.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1705181/000119312522028546/0001193125-22-028546-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1705181/000119312522028546/d437099d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-27T11:08:08.340541+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"}