According to Farside Investors, Grayscale’s US spot Bitcoin ETF (GBTC) recorded $0 million net flow on Sep 11, 2025, indicating no net creations or redemptions for the day. Source: Farside Investors, farside.co.uk/btc This confirms flat primary-market activity from GBTC for the session, providing a neutral fund-flow signal for BTC traders monitoring ETF-driven flows. Source: Farside Investors, farside.co.uk/btc