Deep Tide TechFlow news, on December 20, according to Trader T's monitoring, yesterday the net outflow of the US spot Bitcoin ETF was $671.8 million, the largest single-day outflow since its launch. Among them, Fidelity's FBTC had an outflow of $208.6 million, Grayscale Mini BTC had an outflow of $188.6 million, Ark Invest's ARKB had an outflow of $108.4 million, and GBTC had an outflow of $87.86 million.