Coin Metrics revises 19 months of ETF wallet data but by how much?

Coin Metrics corrected more than 19 months of Bitcoin ETF-related on-chain data, leaving users of its identified-wallet series to reassess any analysis built on the affected history.The Sept. 22 status notice says the correction covers Bitcoin data from Feb. 7, 2025 through Sept. 17, 2026. Coin Metrics listed 35 affected daily series and 25 hourly series, including ETF deposits, withdrawals, transfer counts and transactions. The daily list also included net-flow and supply measures.These are provider-derived observations of activity involving blockchain addresses Coin Metrics identifies as ETF-owned, rather than official ETF share-creation, redemption or fund-accounting records.The notice does not state what caused the recalculation. Moreover, it gives no before-and-after values, aggregate difference or percentage change; does not say whether the revisions generally raised or lowered the figures; and does not identify the largest adjustment or any affected research.What the correction can changeCoin Metrics' deposit methodology defines an ETF deposit as assets sent during an interval to an address the company identifies as ETF-owned. Dollar-denominated deposit flows are calculated ...