Bitcoin ETF exits erase Monday’s rebound as spot selling deepens before the Fed

US spot Bitcoin ETFs recorded a $450 million net outflow on Sept. 15. It more than erased the previous session’s $159 million inflow, while the six completed sessions since Sept. 8 added up to a net $753 million withdrawal.The reversal removed the brief demand signal that appeared as the Federal Reserve began its two-day policy meeting. Bitcoin traded near $75,900 at press time, putting the market close to the lower end of the range in Glassnode’s latest weekly snapshot.ETF net flows measure creations and redemptions across the funds. Investor identities and direct Bitcoin sale execution fall outside the dataset. The useful conclusion is narrower: the ETF reversal arrived alongside broader sell-side pressure. Spot and perpetual sellers move togetherGlassnode’s Week 38 report showed spot cumulative volume delta, a measure of aggressive buying minus aggressive selling, at negative $142 million. That was below its negative $115 million lower statistical band and indicated that sellers were dominating activity on the centralized exchanges in Glassnode’s dataset.Derivatives sellers were active too. Perpetual cumulative volume delta dropped to negative $605 million, far below its negativ...