US spot Bitcoin ETFs lost $82.39 million in net outflows on October 16. Their Ethereum counterparts had no better luck. They gave up $69.68 million the same day.
The October numbers
Combined, the two product groups saw roughly $152 million leave in one session.
The bigger picture is the monthly tally. Bitcoin ETFs had run up roughly $535 million in net outflows for October through mid-month. That reverses September, when the funds pulled in about $2.6 billion of fresh money.
Bitcoin ETF trading volume topped $7.5 billion in the week ending October 16. Net selling over the past week came to only about $145 million.
Not every count of the day matched. Alternative tallies put Bitcoin’s daily outflow as low as $10.6 million, with Fidelity’s FBTC leading the redemptions. Reporting differences between data sources are common with ETF flows, which settle and get compiled on different schedules.
Who holds what
Despite the recent selling, the Bitcoin ETF complex remains enormous. Total assets are estimated at around $105 to $106 billion. The funds collectively hold more than 1.27 million BTC.
Measured against those assets, the $82.39 million outflow is less than a tenth of one percent.
BlackRock’s iShares Bitcoin Trust, ticker IBIT, is the largest Bitcoin ETF by assets. Fidelity’s FBTC and Grayscale’s GBTC round out the most closely watched names. Grayscale’s fund has a longer history than most, having converted from a closed-end trust into a spot ETF.
Ethereum ETFs are a smaller pond. They hold approximately $15 billion in total assets. That makes the $69.68 million daily outflow proportionally heavier than Bitcoin’s, even though the dollar figure is lower.
How we got here
Spot Bitcoin ETFs launched in the US in January 2024. Since then, cumulative net inflows have totaled roughly $57 billion.
Against that backdrop, October’s roughly $535 million in outflows amounts to less than 1% of everything that has flowed in since launch.
Bitcoin is trading near $82,000. Ethereum sits between $2,400 and $2,500.
What this means for investors
More than $7.5 billion in weekly trading against about $145 million in net selling suggests engagement has not disappeared. It has turned cautious.
The simultaneous outflows from both Bitcoin and Ethereum funds point toward a broader risk-off posture rather than a view on one specific asset.
For Ethereum, with a much smaller asset base of approximately $15 billion, sustained outflows of this size would take a bigger proportional bite than equivalent dollar outflows from Bitcoin ETFs.
The spread between an $82.39 million outflow and a $10.6 million one is wide enough to change the tone of a day’s coverage. For anyone trading on flow data, knowing which source you rely on is half the battle.