$449 Million Left US Bitcoin ETFs in Three Days — ARKB Alone Lost $164 Million

For three sessions, the money went one way — and it came out faster each time.

US spot Bitcoin exchange-traded funds recorded $282.6 million in net outflows on Thursday, September 10, according to SoSoValue, the largest single-day withdrawal from the complex since July 13 and the third consecutive red session. The pace of the exit is the story: $46.6 million left on September 8, $120.2 million on September 9, then $282.6 million on September 10. That is roughly $449.5 million handed back in a little over 72 hours by the very products that had spent the previous three weeks pulling in money faster than at any point since January.

A reversal that arrived in a single week

On September 3, the same funds absorbed $730.9 million in one day, their strongest haul since January 14. The week ending September 4 brought in close to $987 million. Over the three weeks before the turn, spot Bitcoin ETFs had pulled in roughly $3.8 billion.

Then the tape flipped. Total net assets across US spot Bitcoin ETFs fell to $97.49 billion on September 10, down from $101.3 billion on September 4 — a $3.8 billion drop in five sessions. Cumulative net inflows since the products launched still stand at $55.17 billion, and Farside Investors’ daily tallies still leave September net positive by roughly $320 million month-to-date. The trend has not broken. The marginal buyer has simply stopped showing up.

ARKB took more than half of the hit

Thursday’s selling was not spread evenly. ARK 21Shares’ ARKB lost $164.3 million, more than half of the day’s total — the same fund that led the September 9 session with $77.98 million of redemptions. Grayscale’s GBTC shed $36.4 million, Fidelity’s FBTC lost $33.6 million, BlackRock’s IBIT gave back $24.5 million, VanEck’s HODL saw $15.3 million leave and Bitwise’s BITB lost $12.6 million.

Morgan Stanley’s MSBT — the fund carrying the 0.14% fee, the cheapest in the category — was the only listed product to finish the day green, with about $4 million of creations. It was also the lone positive print on September 9, when it added $4.49 million.

That pattern says more about investor behaviour than any single flow number. A cheaper share class attracting money on the worst days of the cycle suggests allocators are not abandoning Bitcoin exposure — they are repricing how much they are willing to pay for it.

The other structural risk is concentration. In one recent 30-day window, IBIT alone absorbed $3.575 billion, and in the week ended September 4 it accounted for roughly 70% of the entire complex’s inflows. When the largest single source of demand pauses, the headline number for the whole category moves with it.

Redemptions are mechanical supply, not just sentiment

It is worth being precise about what an outflow is. Money leaving an ETF is not a survey of investor mood; it forces action. When shares are redeemed, the authorized participants — market makers like Jane Street and Virtu — have to deliver bitcoin, which means selling the underlying spot BTC on venues such as Coinbase and Binance.

A large share of this week’s redemptions almost certainly reflects basis-trade unwinds rather than directional panic. Traders who bought spot BTC and shorted CME Bitcoin futures to capture the spread are closing both legs as yields on the short end stay elevated. The trade worked while funding and futures premiums were rich; it stops working when short-term rates are competitive. That unwinding shows up as spot selling pressure even when the investors behind it never changed their view on bitcoin.

XRP funds and staking ETH took the other side

While Bitcoin funds bled, two corners of the same ETF aisle stayed green.

XRP ETFs posted a third straight session of net inflows on September 10. Over the past 20 trading days they have recorded exactly one outflow day — $7.2 million on September 2 — while collecting roughly $190.5 million. Their combined net assets sit near $1.45 billion, with cumulative inflows of about $1.70 billion since the first US spot XRP ETF listed on Nasdaq in November 2025. XRP itself traded near $1.36, down about 2.8% on the day: fund demand and token price are related, but they are not the same signal.

Ethereum told a subtler story. ETH funds added $34.75 million on September 9, led by a staking-enabled product that contributed $22.94 million. On September 10 the category lost $29.76 million overall, but BlackRock’s ETHA took in $13.95 million against the tape. Spot Solana ETFs went from $11.73 million of inflows on September 9 to a marginal $483,000 outflow the next day.

The common thread is selection, not exit. In a world where investors can earn close to 5% on Treasuries, a wrapper that pays nothing to hold has to justify itself on price alone. A wrapper that pays staking yield does not. That gap is exactly why the SEC’s pending decisions on staking in spot Ethereum ETFs and on in-kind redemptions for crypto ETFs matter as much as any macro print.

The clock that actually matters: Wednesday, 2 p.m. ET

The outflows accelerated into this week’s inflation data, and the inflation data did not rescue them. August CPI came in at 3.4% year over year and 0.4% month over month, both in line with consensus. The detail markets traded was underneath: core CPI rose 0.3% month over month against 0.2% expected, an annualized pace near 3.5%, even as the annual core rate cooled to 2.4% — its lowest since 2021.

Bitcoin fell from about $77,100 to $76,040 within minutes of the 8:30 a.m. ET print, then recovered to trade near $77,100 on Friday evening, roughly flat over 24 hours. Ether changed hands around $2,518, up 2.6%, and Solana near $102. Total crypto market capitalization sat near $2.66 trillion.

The bond market is the reason the recovery is shallow. The 30-year Treasury yield whipsawed to its highest level since 2004 before easing to about 5.31%. Fed funds futures now put the odds of a 25-basis-point hike at the September 16 meeting somewhere between 60% and 85%, depending on the venue — up sharply from a week ago. QCP Capital’s read is blunt: a competing 5% risk-free rate without the nominal growth impulse that usually accompanies yield moves is “the worst mix for Bitcoin.” The August rally from $63,000 to $82,000 rested on a narrative of a Treasury liquidity put, and the Treasury’s buyback operations — tripled this week by Scott Bessent’s department — are a symptom of the same problem, not a cure for it.

What to watch next

Friday’s flow report is the first test: a fourth straight day of redemptions would say the streak is structural rather than pre-event positioning. If it inverts, the September 3 and September 4 sessions suggest demand returns fast when the macro noise clears.

Then Wednesday, September 16, at 2 p.m. ET, when the Fed’s decision lands — 24 hours after the Senate’s cloture vote on the CLARITY Act at 2:15 p.m. on September 15. Two events, one after the other, that will define how American institutions price digital assets into year-end. Bitwise’s chief investment officer Matt Hougan is on record predicting a very large fourth quarter for ETF creations once more allocators clear internal approval. The flows of the past three days suggest those approvals are not the bottleneck. The price of the alternative is.

Figures from SoSoValue, Farside Investors, CME FedWatch, the Bureau of Labor Statistics and CoinGecko. Nothing here is investment advice.