Invest1 publisher2 min readPublished
BlackRock took 83 cents of every dollar: the bitcoin ETF surge is one fund's week
Spot bitcoin ETFs pulled $606 million on August 20, and IBIT kept $503 million of it. The month's record total is mostly one issuer, and the first fund liquidation shows why.
The Investor · Invest desk
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What happened
- US spot bitcoin ETFs took in $606.29 million on August 20, their biggest single day since May 1 and a fourth consecutive session of inflows.
- Ether funds added almost $221 million, their largest single-day intake since October 2025 and a fourth straight positive session.
- Hashdex wound up its DEFI bitcoin ETF, the first US spot bitcoin fund ever liquidated, with a final trading day of August 17.
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Why it matters
- constraint Matching IBIT's 0.25% headline fee without an IBIT-sized book does not pay for custody, audit and listing, so the price floor for the whole category is set by the issuer with the deepest revenue base.
- decision An allocator treating the daily flow print as a read on crypto demand is mostly reading one firm's distribution machine, which is a weak proxy for how many buyers are actually showing up.
- exposure The cost of the first wind-down falls on DEFI's remaining holders, who now depend on a NAV payment its filings date two different ways and on where bitcoin sits while the last 225 coins are sold.
- precedent With one liquidation on the board, the next sub-scale fund at parity pricing closing becomes an expected event rather than a surprise, and boards can point to a completed template for doing it.
The four sessions ending August 20 brought in about $1.61 billion [3], which is roughly 78% of everything US spot bitcoin ETFs have collected this month [17]. IBIT's $1.09 billion of that run [4] works out to about 53% of the $2.07 billion August total that decrypt.co, citing SoSoValue, calls the best month of 2026 [8][18]. The record belongs to one fund's week more than to the category.
Thursday was also the narrow one. After IBIT's $502.99 million [1], $103.30 million was left for the other eleven products [19]. Fidelity's FBTC, the next largest taker at $64.74 million [2], collected about 13 cents for every dollar IBIT did [20]. On Wednesday IBIT's share was 55% and none of the twelve funds finished negative [7]; a day later the total was larger and VanEck's HODL was losing money [2]. Earlier in August the same pattern held, with roughly 80% of a $853.5 million five-day haul arriving through IBIT [9].
The liquidation makes the arithmetic concrete. Hashdex's DEFI charged 0.25%, exactly what IBIT charges, on $14.7 million against IBIT's $47 billion [5], an asset base about 3,200 times smaller at the same price [23]. That fee on IBIT's book is worth roughly $117.5 million a year [22]. On DEFI's stated assets it would be about $36,750 [21], and the roughly $26,000 the fund actually threw off [5] implies average assets nearer $10 million over the year [21]. Same sticker, incompatible businesses.
Worth separating from all of this: the flow print did not cause the price. Decrypt traces the move to the Treasury's decision to at least double long-end bond buybacks, then a squeeze that liquidated $3 billion in shorts [16]. Bitcoin traded near $77,000 on Friday, up about 24% on the week and still some 38% below the October 2025 high above $126,000 [14]. The chart has not turned either: the death cross has held since November 16, 2025, and with the 50-day at $63,976 the price needs roughly $5,000 more for a golden cross [15].
Across assets the money did broaden. Ether funds took almost $221 million [11], XRP went from $2.35 million to $13 million and Solana from $2.10 million to $15 million [12], narrowing the bitcoin-to-XRP intake ratio from about 220 to one to about 47 to one [24]. Inside bitcoin, none of that breadth reached the small products.
What to watch
- Whether IBIT's share reverts toward the mid-week 55% once the inflow streak breaks, or holds near 80% as it did earlier in August.
- Whether the seven remaining sessions push August past $2.07 billion, and how much of any addition arrives through a single fund.
- Which of the two dates in Hashdex's filings the DEFI cash payment actually lands on, and at what net asset value after closing costs.