{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-23-037180","form_type":"8-K","ticker":"GBTC","cik":"0001588489","company_name":"Grayscale Bitcoin Trust ETF","filed_at":"2023-08-02T23:59:59+00:00","discovered_at":"2026-05-14T18:03:34.449779+00:00","generated_at":"2026-06-12T13:34:27.910409+00:00","sec_items":["8.01"],"event_type":"other","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"Grayscale Bitcoin Trust adds Bitstamp to pricing index, effective July 29","bullets":["Index Provider added Bitstamp to CoinDesk Bitcoin Price Index (XBX) effective July 29, 2023.","Bitstamp was added due to meeting minimum liquidity requirement; no exchanges were removed.","Index now includes Coinbase, Kraken, LMAX Digital, and Bitstamp.","Quarterly reviews allow adding/removing exchanges based on liquidity criteria."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-23-037180","json":"https://secwatch.observer/filing/0000950170-23-037180.json","markdown":"https://secwatch.observer/filing/0000950170-23-037180.md","text":"https://secwatch.observer/filing/0000950170-23-037180.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1588489/000095017023037180/0000950170-23-037180-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1588489/000095017023037180/gbtc-20230729.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-12T13:34:27.910409+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"}