Overview
- Spot Bitcoin ETFs recorded about $462.7 million in net outflows during Sept. 7–11, ending a three‑week inflow streak and marking four straight sessions of withdrawals that hit a peak single‑day exit of roughly $282.7 million.
- US Ether ETFs attracted roughly $196.9 million over the same Sept. 7–11 window with BlackRock’s Ethereum product leading several standout inflow days.
- BlackRock’s iShares Bitcoin Trust (IBIT) has accumulated about $1.08 billion in net inflows over the past 20 days while Grayscale’s GBTC lost about $254.7 million in that span, concentrating demand with IBIT and shrinking GBTC’s market share.
- ETF mechanics and product design are shaping flows: new ETF purchases require on‑chain asset additions that change custodial holdings, IBIT charges a much lower fee than GBTC (0.25% versus 1.5%), and some Ethereum ETFs offer staking‑style yield that Bitcoin products do not.
- A one‑day recovery on Sept. 14 brought roughly $160 million back into Bitcoin ETFs and lifted total category assets above $100 billion but analysts caution the Fed meeting will be the key test and multiple sessions of consistent flows are needed to confirm any durable rotation from BTC to ETH.