According to TechFlow, on September 17, according to SoSoValue data, yesterday (September 16, US Eastern Time), the total net inflow of Bitcoin spot ETFs was $12.9041 million. Yesterday, Grayscale ETF GBTC had a single-day net outflow of $20.7546 million, and the current historical net outflow of GBTC is $20.061 billion. Grayscale Bitcoin Mini Trust ETF BTC had a single-day net inflow of $2.8236 million, and the current historical total net inflow of Grayscale Bitcoin Mini Trust BTC is $383 million.

The Bitcoin spot ETF with the largest daily net inflow yesterday was BlackRock's ETF IBIT, with a daily net inflow of $15.8187 million. Currently, IBIT's total historical net inflow has reached $20.924 billion. The second largest was Fidelity's ETF FBTC, with a daily net inflow of $5.0641 million. Currently, FBTC's total historical net inflow has reached $9.648 billion. As of press time, the total net asset value of Bitcoin spot ETFs was $52.57 billion, and the ETF net asset ratio (market value to Bitcoin's total market value) reached 4.61%, with a historical cumulative net inflow of $17.31 billion.