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Bitcoin ETF Buying Rebuilds Momentum With $2.95 Billion in 30-Day Inflows

By Isaac • September 29, 2026 11:21 pm • Comments

Institutional Bitcoin demand has rebuilt faster than the market mood might suggest.

U.S. spot Bitcoin exchange-traded funds added $2.95 billion over the 30 days through Monday, according to SoSoValue data reported by Decrypt. The funds also reached eight straight trading days of net inflows, a sharp reversal from the selloff that followed the Senate’s failed vote to advance the Clarity Act.

The latest daily numbers show the buying did not stop there. Farside Investors reported another $66.2 million of net Bitcoin ETF inflows for September 29, which would extend the run to a ninth session.

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Decrypt’s review of the fund data puts the reversal in perspective, tracing the 30-day total, the sequence of daily flows and the policy shock that briefly knocked demand off course. Bitcoin ETFs lost $450.4 million on September 15, their worst one-day outflow since late June, as the Senate fell short of the 60 votes needed to move the Clarity Act forward and traders reassessed the near-term path for U.S. market-structure legislation.

Two days later, money began returning. The rebound accelerated with nearly $1 billion of net inflows on September 21 and another $715 million the following day.

The week produced roughly $2.4 billion of net buying, the strongest weekly haul since October 2025.

The pace then cooled, but it did not reverse. A giant one-day print can be driven by positioning around a single event.

A string of positive sessions says buyers are continuing to allocate even after the first rush.

Decrypt also noted that the earlier weekly total had fallen to only $6.2 million, the smallest in 141 weeks. The rebound therefore repaired a genuinely weak stretch rather than merely adding to an uninterrupted climb.

The September 29 breakdown from Farside Investors showed BlackRock’s IBIT taking in $51.1 million and ARKB adding $33.2 million. BITB posted an $18.1 million outflow, while the remaining listed funds were flat.

The result was a positive session despite money moving in different directions across individual products. That breadth is narrower than a market-wide rush, but it still kept the aggregate streak alive.

IBIT supplied most of the day’s gross buying, while ARKB more than offset BITB’s redemption. The zero-flow readings elsewhere show that the aggregate gain depended on a small group of active funds.

The flow picture is not uniformly bullish across crypto funds. Farside’s September 29 tally showed Ether ETFs with a small $2.8 million net outflow.

That contrast makes Bitcoin’s positive session more notable: fresh capital favored Bitcoin rather than lifting every crypto product at once.

Decrypt also reported that Ether funds added $982.5 million over the prior 30 days, while Solana products brought in $278.2 million and XRP funds added $127.05 million. Those are meaningful totals, but Bitcoin remained the dominant institutional allocation.

The 30-day surge also moved the average Bitcoin ETF holder back above the reported cost basis of $81,722. That does not guarantee higher prices, and fund flows can turn quickly when rates, regulation or risk appetite change.

It does remove some of the pressure that comes when a large block of recent buyers is underwater.

Institutional flows cannot settle Bitcoin’s next move. Regulated fund demand did, however, absorb a major policy-driven setback and return with enough consistency to build a new streak.

For a market trading near $83,000, that steady bid may matter more than any single day’s headline number.

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