Core Insights - The total net outflow from Bitcoin spot ETFs reached $158 million on December 19, according to SoSoValue data [1] - The highest single-day net inflow was recorded for Fidelity's Bitcoin ETF (FBTC), which saw an inflow of $15.33 million, bringing its historical total net inflow to $12.208 billion [1] Group 1 - Bitcoin spot ETFs experienced a significant net outflow of $158 million on December 19 [1] - Fidelity's Bitcoin ETF (FBTC) led the market with a net inflow of $15.33 million for the day [1] - FBTC's cumulative historical net inflow has now reached $12.208 billion [1]