Bitcoin ETF Inflows Stay Positive, but BlackRock and Fidelity Carry the Entire Day

U.S. spot Bitcoin exchange-traded funds finished September 4 with another positive session, but the headline number hides how narrow the buying became.

The funds took in a combined $174.6 million. Every reported dollar came through just two products: BlackRock’s IBIT and Fidelity’s FBTC.

According to CryptoSlate, IBIT collected $117.4 million while FBTC added $57.2 million, making BlackRock responsible for roughly two-thirds of the session’s reported demand. The other ten products in the daily table recorded no net flow, a sharp change from the broader participation seen one day earlier.

The September 4 total was about 76.1% below the $730.8 million that entered the group one session earlier, when seven different products contributed to the result. That is a major loss of speed and breadth, though not a reversal: money still moved into the funds on a net basis.

The difference was breadth. Seven products contributed to the previous day’s inflow.

On September 4, only two did. That makes the latest result less convincing as a whole-market demand signal even though it remains constructive for Bitcoin.

The sequence also followed a $236.5 million outflow on September 1 and a $101.1 million inflow one day later. Across the four sessions through September 4, the funds still added a net $770 million.

That is why the 76% decline needs context. It compares one unusually strong day with a smaller positive day, rather than showing a 76% loss in ETF assets or Bitcoin holdings.

IBIT supplied roughly two-thirds of the September 4 total, with FBTC providing the balance. The concentration left ten listed products at zero for the day.

The result therefore says two things at once: net demand survived the slowdown, but participation across issuers narrowed dramatically. That combination is more informative than the percentage change alone.

The underlying Farside Investors table is important here because ETF flows measure creations and redemptions in listed funds. They do not describe every form of Bitcoin buying, selling or movement.

A separate September 4 corporate reserve update illustrates another channel of institutional exposure. It is not part of the daily spot ETF figure.

The funds themselves also differ in size, liquidity and investor base, so a zero-flow day does not mean investors abandoned those products. It only means creations and redemptions netted to zero in the reported table.

$MSTR has $52B of Net Reserve after debt and preferred claims. pic.twitter.com/1cT4HMkiIr

— Strategy (@Strategy) September 4, 2026

On-chain activity also has to be read carefully. Whale Alert’s research into a group of dormant Bitcoin transactions concluded that the coins came from early mined blocks but were not connected to Satoshi Nakamoto.

ℹ️ ℹ️ ℹ️ Yesterday's dormant transactions were made by addresses that mined 50 bitcoin:native in blocks 43361, 43452, 43647, 43680, 43765, 43855 and 43871.

According to our research, none of these blocks were mined by Satoshi. Read more about it here:https://t.co/TzCdHiPBOG

— Whale Alert (@whale_alert) September 6, 2026

That distinction matters. A large wallet transfer can attract attention without representing an ETF redemption, an exchange sale or a new institutional allocation.

ETF tables are best read as one clean institutional demand gauge rather than a complete map of Bitcoin’s market. Corporate treasuries, direct spot buyers, derivatives and private transactions continue outside that channel.

The clean takeaway is narrower than either the bulls or bears may want. Bitcoin funds remained in positive territory, but participation weakened sharply and the day depended entirely on BlackRock and Fidelity.

The next useful signal will be whether inflows broaden again across more issuers. A second strong, widely shared session would say more about sustained demand than one positive total concentrated in two funds.

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