US-listed spot Bitcoin exchange-traded funds (ETFs) ended a nine-day inflow streak as Bitcoin fell below $78,000, while several altcoin ETF categories continued to attract capital.

Bitcoin ETFs recorded $201.8 million in net outflows on Friday, according to SoSoValue data, bringing nine consecutive trading sessions of inflows to a close. The reversal followed a run in which the funds had drawn more than $3 billion in net inflows, and August flows remained positive at $3.3 billion with one US trading session left in the month. Total net assets fell to $97.6 billion after topping $100 billion on Thursday.

Daily ETF flow data has become one of the most widely tracked gauges of institutional demand for crypto exposure since the first US spot Bitcoin ETFs launched in January 2024, which is why single-day reversals like Friday's draw close market attention even when monthly figures remain positive.

The Bitcoin ETF reversal contrasts with continued inflows into Ether and XRP funds, while Solana ETFs have reached new asset milestones.

ARK 21Shares leads Bitcoin ETF outflows

The ARK 21Shares Bitcoin ETF (ARKB) led Friday's withdrawals with $114.9 million in net outflows, followed by the Bitwise Bitcoin ETF (BITB) with $49.7 million, according to Farside Investors data. BlackRock's iShares Bitcoin Trust ETF (IBIT), the largest US spot Bitcoin ETF by assets, recorded $33.4 million in outflows. Notably, the outflows were concentrated in smaller funds, with IBIT — typically the most traded crypto ETF — seeing a comparatively modest withdrawal.

Morgan Stanley's Bitcoin Trust (MSBT) was the only fund to post inflows on Friday, adding $9.3 million.

Ether, XRP ETFs buck Bitcoin outflows

Ether and XRP ETFs continued to see inflows Friday despite the reversal in Bitcoin funds, adding $102.2 million and $26.2 million, respectively, according to SoSoValue data for Ether and XRP funds. The Ether funds last recorded net outflows on Aug. 11 and the XRP funds on Aug. 5. The divergence suggests allocator interest has not retreated from crypto ETFs broadly, with capital rotating toward altcoin products even as Bitcoin funds saw redemptions.

Solana ETFs, which launched in the US in July, have also maintained positive momentum. Bloomberg ETF analyst Eric Balchunas said Friday that the category had attracted $1.7 billion in cumulative flows without a sustained stretch of outflows. Bitwise's Solana ETF also became the first fund in the category to cross the $1 billion mark, according to the analyst.

Balchunas called the performance "impressive" despite what he described as a "nightmare downturn" in the first half of the year.

With one trading session remaining in August, the final monthly flow tally for Bitcoin ETFs — and whether the altcoin categories extend their inflow streaks into September — will be the next data point watchers look to.