Bitcoin spot ETFs experienced a significant net outflow of $1.257 billion during the trading week of May 18–22, according to SoSoValue data. BlackRock's IBIT led the outflows with $1.008 billion, increasing its cumulative historical net outflow to $64.77 billion. Fidelity's FBTC followed with a weekly net outflow of $112 million, bringing its total historical net outflow to $10.76 billion.