---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-22-000297"
form_type: "8-K"
ticker: "GBTC"
cik: "0001588489"
company_name: "Grayscale Bitcoin Trust ETF"
filed_at: "2022-01-13T23:59:59+00:00"
generated_at: "2026-06-27T18:14:10.990646+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# Grayscale Bitcoin Trust amends Bitcoin valuation fallback rules effective Jan 11

## Summary
- Amended cascading rules for determining Index Price when CoinDesk XBX is unavailable or inaccurate.
- New tiered approach: primary (CoinDesk XBX), secondary (Coin Metrics Real-Time Rate), tertiary (principal market spot price), then sponsor's best judgment.
- Sponsor has sole discretion to determine if an index does not reflect accurate price with no predefined criteria.
- Change effective January 11, 2022; non-GAAP methodology not used in financial statements.

## SEC filing metadata
- accession: 0000950170-22-000297
- form_type: 8-K
- ticker: GBTC
- cik: 0001588489
- company_name: Grayscale Bitcoin Trust ETF
- filed_at: 2022-01-13T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1588489/000095017022000297/0000950170-22-000297-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1588489/000095017022000297/gbtc-20220111.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-22-000297
- JSON: https://secwatch.observer/filing/0000950170-22-000297.json
- Plain text: https://secwatch.observer/filing/0000950170-22-000297.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.