On September 28, US Bitcoin exchange-traded funds brought in a modest $31 million in net inflows as institutional interest cooled while BTC met resistance beneath a key supply wall.
Figures from SoSoValue show that BlackRock’s iShares Bitcoin Trust (IBIT) topped the day with $54.84 million in inflows, picking up approximately 657 Bitcoin and pushing its total reserves past the 800,000 BTC threshold for the first time since May 26.
Meanwhile, Grayscale’s Bitcoin Mini Trust (BTC) pulled in an additional $10.32 million. On the flip side, Fidelity’s Wise Origin Bitcoin Fund (FBTC) shed $10.90 million, and Grayscale’s GBTC experienced $23.19 million in outflows. All other products saw zero net movement during the trading session.
While the $31.07 million total kept the positive inflow streak for US spot Bitcoin ETFs alive at eight sessions, it represented the weakest performance of that entire sequence.
Momentum has steadily weakened since September 21, when daily inflows neared the $1 billion mark. After tapering off through the remainder of the prior week, inflows dropped to just $31 million on Monday, leaving the latest figure roughly 97% below that high point.
This recent cooling stands in stark contrast to broader weekly performance. The funds secured $2.4 billion last week, marking their highest weekly intake of 2026 and the best performance since October 2025.
That strong wave successfully reversed year-to-date flows back into positive territory following a $5.8 billion deficit as recently as July. Furthermore, SoSoValue indicates that these recent additions have driven month-to-date inflows to $2.73 billion, pushing total net inflows for 2026 to approximately $1.01 billion.
Bitcoin stalls at heavy supply zone
The deceleration in ETF buying is taking on greater importance as Bitcoin faces difficulties pushing its recovery further.
Following a pullback from the prior week’s push above $87,000, Bitcoin hovered near $84,000, reentering a price corridor where Glassnode notes a massive concentration of long-term-holder supply.
Data from the analytics firm indicates that more long-term coins are clustered between $84,000 and $85,000 than anywhere else on its cost-basis distribution map. This dense accumulation risks triggering heavier sell pressure as investors break even or secure profits.
Glassnode emphasized that Bitcoin must successfully breach this area and maintain its position above it to sustain the broader uptrend.
Throughout September’s price climb, ETF inflows played a crucial role in absorbing that selling pressure. Glassnode noted that these incoming funds fueled last week’s roughly 4% gain despite persistent selling from perpetual-futures traders and profit-takers.
Consequently, the shrinking volume of these inflows leaves fewer institutional buyers on hand just as Bitcoin challenges this heavy supply cluster.
With Bitcoin trading near $84,000, Monday’s $31 million net inflow translated to fewer than 400 BTC. In contrast, the nearly $1 billion that flooded the funds early last week equaled over 11,000 BTC at comparable prices.
Although ETF volume does not map directly onto an exact quantity of same-day spot purchases, the comparison highlights a steep drop in the marginal institutional bid.
This dynamic places significant importance on the upcoming sessions. A resurgence in ETF demand could assist Bitcoin in clearing the $84,000 to $85,000 supply belt and clear a path upward. Conversely, if inflows continue to dry up or turn negative, the digital asset may find it difficult to overcome the resistance zone that halted its most recent rally.
Frequently Asked Questions
- How much did US Bitcoin ETFs pull in on September 28? US spot Bitcoin ETFs recorded $31 million in net inflows on September 28, marking the lowest single-day intake during an eight-session positive streak.
- Which fund led the inflows on September 28? BlackRock’s iShares Bitcoin Trust (IBIT) led the session by drawing $54.84 million in inflows, which pushed its total holdings above 800,000 BTC.
- Why is the $84,000 price level significant for Bitcoin? According to Glassnode, the $84,000 to $85,000 range contains a massive concentration of long-term-holder supply, creating a heavy supply barrier that could prompt increased selling pressure.
- How do recent ETF inflows compare to earlier peaks? Monday’s $31 million intake was roughly 97% lower than the daily inflows of nearly $1 billion recorded on September 21.
