According to SoSoValue data, Bitcoin spot ETFs saw a total net outflow of $161 million yesterday (December 18th, Eastern Time). The Bitcoin spot ETF with the largest single-day net inflow was BlackRock ETF IBIT, with a net inflow of $32.7631 million. IBIT's historical total net inflow has reached $62.665 billion. The Bitcoin spot ETF with the largest single-day net outflow was Fidelity ETF FBTC, with a net outflow of $170 million. FBTC's historical total net inflow has reached $12.193 billion. As of press time, the total net asset value of Bitcoin spot ETFs is $111.041 billion, with an ETF net asset ratio (market capitalization as a percentage of Bitcoin's total market capitalization) of 6.58%, and a historical cumulative net inflow of $57.565 billion.