{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-220464","form_type":"8-K","ticker":"BCHG","cik":"0001732409","company_name":"Grayscale Bitcoin Cash Trust (BCH)","filed_at":"2025-09-26T23:59:59+00:00","discovered_at":"2026-05-14T18:02:44.831844+00:00","generated_at":"2026-05-17T05:34:39.315621+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"BCHG NAV valuation index changing to CoinDesk BCH CCIXber Reference Rate from Oct 1","bullets":["Effective Oct 1, 2025, BCHG NAV will use the CoinDesk BCH CCIXber Reference Rate instead of the prior CoinDesk Bitcoin Cash Index (BCX).","New index is a volume-weighted real-time price from Constituent Trading Platforms such as Crypto.com, Kraken, LMAX Digital, and Bitstamp.","Index methodology includes outlier detection, inactivity adjustment, and manipulation resistance; exact algorithm is not publicly available.","If the primary index is unavailable, the Sponsor will use a cascading fallback: Coin Metrics Secondary Index, then a Tertiary Pricing Option, then a good-faith estimate.","No financial impact or change in Trust holdings was disclosed; the change is purely a valuation methodology update."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-220464","json":"https://secwatch.observer/filing/0001193125-25-220464.json","markdown":"https://secwatch.observer/filing/0001193125-25-220464.md","text":"https://secwatch.observer/filing/0001193125-25-220464.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1732409/000119312525220464/0001193125-25-220464-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1732409/000119312525220464/bchg-20250926.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T05:34:39.315621+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"}