{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-26-089976","form_type":"8-K","ticker":"GTAO","cik":"0002029297","company_name":"Grayscale Bittensor Trust (TAO)","filed_at":"2026-03-04T23:59:59+00:00","discovered_at":"2026-05-14T18:02:37.042138+00:00","generated_at":"2026-05-15T21:52:26.777890+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"Grayscale Bittensor Trust (TAO) changes NAV valuation index to CoinDesk Bittensor Benchmark Rate effective March 6, 2026","bullets":["As of March 6, 2026, Trust's NAV per share will be calculated using CoinDesk Bittensor Benchmark Rate (previously Coin Metrics Real-Time Rate).","Index provider CoinDesk selects constituent trading platforms based on criteria including market quality, security, legal/regulatory, KYC, data, transparency, team, and negative events.","Index algorithm uses volume weighting, FX conversion, outlier detection, inactivity adjustment, and manipulation resistance; recalculation every 5 seconds over 24-hour period.","If Index becomes unavailable, Sponsor will cascade to Secondary Index (Coin Metrics Real-Time Rate), Tertiary Pricing Option (principal market), or good faith estimate."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-26-089976","json":"https://secwatch.observer/filing/0001193125-26-089976.json","markdown":"https://secwatch.observer/filing/0001193125-26-089976.md","text":"https://secwatch.observer/filing/0001193125-26-089976.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/2029297/000119312526089976/0001193125-26-089976-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/2029297/000119312526089976/tao-20260304.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T21:52:26.777890+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"}