According to Lookonchain monitoring, on October 21, US Ethereum and Bitcoin ETF data revealed that: Nine US Ethereum ETFs have a total net outflow of 3081 ETH, which is about 8.24 million US dollars, of which grey release ETHE has outflow of 6178 ETH, which is about 16.51 million US dollars, and the current grey release holdings are 1,619,808 ETH, which is about 4.33 billion US dollars; Ten US Bitcoin ETFs have a total net inflow of 4,330 BTC, which is about $290.85 million, of which ARK21Shares has inflow of 1,598 BTC, which is about $107.35 million. The current ARK21Shares holdings are 52,347 BTC, which is about $3.52 billion.