{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-22-028539","form_type":"8-K","ticker":"GBTC","cik":"0001588489","company_name":"Grayscale Bitcoin Trust ETF","filed_at":"2022-02-04T23:59:59+00:00","discovered_at":"2026-05-14T18:04:07.228963+00:00","generated_at":"2026-06-27T11:04:25.133284+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":"Grayscale Bitcoin Trust switches Bitcoin valuation to CoinDesk XBX Index Price, dropping prior averaging","bullets":["New Index Price removes additional daily averaging; uses raw 24-hour VWAP from CoinDesk XBX as of 4 pm NY time.","Historical average difference between Old and New Index Price was 0.31% from Jan 2019 to Dec 2021.","No change to index composition or exchange selection criteria; methodology aligns with publicly available XBX.","Old Index License Agreement with TradeBlock terminated Jan 31, 2022; new agreement effective Feb 1, 2022."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-22-028539","json":"https://secwatch.observer/filing/0001193125-22-028539.json","markdown":"https://secwatch.observer/filing/0001193125-22-028539.md","text":"https://secwatch.observer/filing/0001193125-22-028539.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1588489/000119312522028539/0001193125-22-028539-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1588489/000119312522028539/d466708d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-27T11:04:25.133284+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"}