Techub News reports that according to iChainfo data, on December 19, Eastern Time, the total net outflow of Bitcoin spot ETFs in the United States was approximately $680 million, setting a record for the largest single-day net outflow of funds. Among them, Grayscale ETF GBTC had a net outflow of approximately $87.86 million; Bitwise ETF BITB had a net outflow of approximately $43.61 million; Ark & 21Shares ETF ARKB had a net outflow of approximately $108 million; Invesco Galaxy ETF BTCO had a net outflow of approximately $25.97 million; Fidelity ETF FBTC had a net outflow of approximately $209 million; Grayscale Micro ETF BTC had a net outflow of approximately $189 million; VanEck ETF HODL had a net outflow of approximately $10.91 million; Valkyrie ETF BRRR had a net outflow of approximately $8.19 million; WisdomTree ETF BTCW had a net inflow of approximately $2.05 million, while BlackRock ETF IBIT, Franklin ETF EZBC, and Hashdex ETF DEFI had no net inflow or outflow of funds.