According to Farside Investors, the US Bitcoin ETF daily net flow for Grayscale was reported at 0 million dollars on Dec 19, 2025, based on its Bitcoin ETF flow tracker sourced at farside.co.uk/btc. According to Farside Investors, a zero net flow denotes no net creations or redemptions recorded for that session on the Grayscale US Bitcoin ETF, indicating no ETF-specific incremental buy or sell flow for BTC that day per the tracker’s definition, with full data and methodology provided by Farside Investors at farside.co.uk/btc.