Bitcoin Back at ETF Holders' Cost Basis as $729M Leaves Funds

Investors in US spot Bitcoin (BTC) exchange-traded funds (ETFs) withdrew $729 million during two sessions this week. The wave of selling arrived as BTC moved back to the funds' estimated average entry price, implying many holders regard breakeven as a way out.

The aggregate figure, though, masks a clear divide. BlackRock's iShares Bitcoin Trust (IBIT) continues to buy on a net basis in October, while Fidelity's Wise Origin Bitcoin Fund (FBTC) has alone lost more than the market's total.

What Is Behind Bitcoin ETF Selling at Breakeven?

Bloomberg Intelligence ETF analyst James Seyffart estimates the average US spot Bitcoin ETF holder's entry price at $81,722 per coin. When the cryptocurrency moved above that threshold in late September, he drew attention to the shift.

NEW: The average Bitcoin ETF Holder is back above water for the first time since January. The rally this morning has bitcoin:native above our estimated ETF cost basis of $81,722 per coin. h/t @EricBalchunas

— James Seyffart (@JSeyff) September 21, 2026

Two weeks later, most of that cushion has now gone. BTC was last seen at $81,607, 2.2% lower over 24 hours, according to BeInCrypto's Bitcoin market data.

That puts the average ETF position slightly back in the red.

Holders did not linger to see how it played out. US spot Bitcoin ETFs lost $484.9 million on Oct. 7, per Farside figures, erasing the prior session's $118.8 million inflow.

Oct. 8 brought another $244.1 million in withdrawals. Combined, the two days removed October's early inflows and put the month-to-date net flow at -$407.4 million.

Selling once the entry price is reached is a common behavior. Holders who endured a long stretch of losses commonly leave once their capital is restored, and that can make the cost basis a level of resistance.

A Bitcoin ETF Retreat or Mainly a Fidelity Issue?

Issuer-level data gives a more contained picture than the aggregate number. According to Farside, the Oct. 1 to Oct. 8 outflow was clustered among a small group of providers.

Fund — net flow, Oct. 1 to 8:
Fidelity FBTC -$408.1 million
ARK 21Shares ARKB -$214.9 million
Grayscale GBTC -$78.9 million
Bitwise BITB -$52.2 million
BlackRock IBIT +$332.5 million
All US spot Bitcoin ETFs -$407.4 million

The amount leaving FBTC is larger than the net outflow for the whole market. And the fund recorded net withdrawals in five of the six October sessions tracked.

IBIT, meanwhile, took in $332.5 million. Strip out BlackRock's product and the remaining ETFs were down a combined $739.9 million.

Even so, IBIT did not escape once BTC got to breakeven. The fund saw $207.7 million leave on Oct. 7, its biggest outflow of October.

The split implies the selling is coming from particular investor groups, not a sector-wide turn against Bitcoin exposure.

And the pressure reaches beyond Bitcoin. US spot Ethereum ETFs have reported outflows for eight straight sessions, shedding $641.3 million since Sept. 29, according to Farside. BeInCrypto had earlier followed the building Ethereum ETF outflow streak.

Spot ETFs were heavy buyers in September's advance, taking in over $2.3 billion from Sept. 21 through Sept. 30 alone. That support now looks tied to a single price point more than to lasting conviction.

Looking ahead, the key test is whether these vehicles can win over new buyers once the breakeven escape hatch closes.