Bitcoin ETFs: BlackRock Gains $1.08B as Grayscale Loses $255M

Published: 2026-09-15 05:57:55 |

BlackRock’s iShares Bitcoin Trust (IBIT) recorded approximately $1.08 billion in net inflows over 20 days, while Grayscale Bitcoin Trust (GBTC) saw about $254.7 million in outflows, according to Arkham Intelligence data. The figures highlight a widening shift in investor preference between Bitcoin ETFs. IBIT attracted notable daily inflows of $454 million on September 3 and $277.6 million on August 27. Its holdings have risen to roughly 785,000 BTC, with assets under management above $60 billion. GBTC holds about 130,000 BTC and manages close to $10 billion. Fees appear to be a key factor. IBIT charges a 0.25% annual expense ratio, compared with 1.5% for GBTC. The higher cost has contributed to persistent outflows from GBTC, despite Grayscale launching the lower-fee Bitcoin Mini Trust. US spot Bitcoin ETFs now hold more than 1.28 million BTC, or roughly 6% of Bitcoin’s total supply. The wider ETF category attracted over $3 billion during the recent surge. While transfers from GBTC to IBIT are broadly price-neutral when they represent fund rotation, growing ETF ownership could reduce available Bitcoin supply and support long-term demand. Traders should monitor daily ETF flows, BTC price action and whether GBTC outflows accelerate.

Bullish

The market impact is bullish overall because BlackRock’s Bitcoin ETF attracted $1.08 billion while US spot Bitcoin ETFs collectively hold more than 1.28 million BTC. Persistent institutional inflows can tighten liquid supply and provide a long-term demand signal, particularly if ETF ownership continues to rise. The immediate price effect is less clear. Capital moving from GBTC to IBIT is mainly an ETF rotation, so it does not necessarily create equivalent net buying of BTC. Traders should therefore distinguish between total industry inflows and transfers between funds. Short term, strong daily inflows may support sentiment and trigger momentum buying, while accelerating GBTC outflows could signal continued product migration rather than broad market weakness. The sixfold fee gap—0.25% for IBIT versus 1.5% for GBTC—makes continued reallocation plausible. Similar post-launch flows in spot Bitcoin ETFs have often influenced BTC through expectations of institutional demand, although macroeconomic conditions, leverage and price resistance remain important. Long term, growing ETF custody may support Bitcoin prices, but it also concentrates market influence among large asset managers and could increase sensitivity to future ETF outflows.