According to CoinMeta, in the past four trading days, there has been a continuous inflow of funds into US spot BTC ETF amounting to 422 million US dollars. Among them, IBIT saw the largest inflow, totaling 366 million US dollars, followed by FBTC with an inflow of 51.3 million US dollars. According to media reports, the spot BTC ETF tracking strategy, which is under development, shows a significant positive correlation between the inflow of funds into ETF and the price of BTC.