ETF demand for Bitcoin wanes, putting $81,300 cost basis under scrutiny

Demand for US spot bitcoin ETFs made a brief comeback last week before it dissipated. The price of bitcoin is now putting pressure on the average purchase price held by ETF investors.

Capital returned to US spot bitcoin ETFs early last week but reversed direction swiftly. A preliminary Farside figure shows a net inflow of $301.2 million for the week ending October 23, after the funds attracted $1.07 billion in the first three trading days and then shed $773.5 million in the final two. Over the same period, bitcoin's price eased back toward $80,000, a level that approaches the breakeven point for the typical ETF participant.

Earlier:

• Bitcoin buyers push back as sellers press on; two price levels for swing traders to monitor
• Strategy trims bitcoin buys as buybacks get priority before earnings report

What happened

The week started with strength. Monday saw $526.7 million in inflows to spot bitcoin ETFs, followed by $23.2 million on Tuesday and $524.8 million on Wednesday. The leading product was BlackRock's iShares Bitcoin Trust (IBIT), which recorded $665.2 million on Monday, its biggest one-day intake since October 2025.

The sentiment shifted sharply after that. Thursday saw $635.6 million exit the funds, the highest single-day outflow since June, with a further $137.9 million pulled out on Friday. IBIT experienced $254.1 million in withdrawals on Thursday and $110.3 million on Friday, yet its net inflows for the week still stood at $565.7 million.

The week did break a string of two consecutive weeks defined by outflows. Despite this, US spot bitcoin ETFs are still in net outflow territory for October, sitting at roughly -$313.5 million.

Why it matters

A purchase of shares in a spot bitcoin ETF leads the fund to acquire bitcoin as backing. Selling prompts the fund to potentially dispose of bitcoin. This mechanism makes ETF flow data a helpful, though not flawless, measure of demand channeled through these instruments. The data does not reveal the identity or motives of traders, and a single robust inflow day does not imply a lasting pattern.

Price action provided the other piece of the puzzle. Bitcoin declined by roughly 3.45% across the two days of outflows, slipping under $80,000 at one point over the weekend before climbing back toward $80,600. The early inflow surge failed to move the price significantly, while the late-week selling drove it downward.

The level traders are watching

A key support band between $80,000 and $82,000 has been highlighted by Coinbase Institutional. The assessment draws on two markers: a projected average cost basis of $81,300 for ETF participants and the 50-day moving average, which sits around $81,700.

The cost basis is significant because it roughly sits at the breakeven point for the average ETF investor. As long as the price remains above this level, holders see small profits. A prolonged dip beneath it could put many in a loss position, prompting some to sell instead of holding out. Coinbase cautions that a sustained breach of this zone might lead bitcoin down further, to a range of $73,000 to $75,000.

A shift in who's buying

A broader shift is underway. According to Coinbase Institutional, corporate treasury firms acquired roughly $14.5 billion in bitcoin during the first half of 2026, while US spot ETFs posted nearly $5 billion in net disposals. This dynamic reversed after August: ETFs have pulled in around $6.4 billion, compared to $1.5 billion for corporate treasuries.

This inversion is important because Strategy, the largest corporate purchaser, has trimmed its weekly buys to just a few hundred coins in recent weeks. If ETFs have now become the primary wellspring of sustained demand, the volatility in their flows wields greater influence over price than earlier in the year.

The macro backdrop

Interest rate dynamics introduce a fresh risk layer. US producer prices climbed 1.3% month over month in September, the biggest monthly jump since March 2022, prompting markets to increase the probability of a Federal Reserve rate increase in December. Elevated rates generally squeeze financial conditions and boost the appeal of yield-bearing assets compared to non-yielding ones like bitcoin. This correlation is not absolute, but it is a headwind that merits attention.

Ethereum went the other way

The week for Ether ETFs was more subdued, posting $220.7 million in net outflows. BlackRock's iShares Ethereum Trust (ETHA) represented $233.2 million of these withdrawals, experiencing losses across four consecutive trading days before a modest group-wide inflow emerged on Friday.

What to watch next

The primary indicator to monitor is whether bitcoin can defend the $80,000 to $82,000 band. A price recovery above the ETF cost basis, combined with fresh inflows, would indicate last week's sell-off was a break rather than a directional shift. Persistent outflows alongside trading below $81,300 would suggest ETF holders are exiting positions in the red, bringing the $73,000 to $75,000 range into focus.

The upcoming set of Farside metrics will clarify the direction. The flow pattern and the price reaction should be evaluated together; a lone day of inflows should not be interpreted as a bullish sign. For market participants, the pragmatic takeaway is that the ETF buyer's cost basis now carries genuine behavioral significance: the point where many holders break even is frequently the point where their behavior shifts.