On March 19th, according to the on-chain analyst Yu Jin's monitoring, ten BTC spot ETFs had a net outflow of $1.5444 billion on March 18th. Correspondingly, after the opening of the US stock market tonight (March 19th), approximately 2,306 BTC will be withdrawn from the ETF custody address: - Outflow: Grayscale (GBTC) had an outflow of about 9,596 BTC (corresponding to a fund outflow of $642.52 million on March 18). - Inflow: The other nine ETFs had an inflow of about 7,290 BTC (corresponding to a fund inflow of $480.8 million on March 18). The main force was BlackRock (IBIT), with an inflow of 6,743 BTC ($451.48 million). Currently, the total amount of BTC held by the ten BTC spot ETFs is as follows: 836,814 BTC ($56.03 billion).