U.S. crypto spot ETF flows were mixed on September 29, with Bitcoin and Solana products attracting fresh capital while Ethereum funds recorded net outflows.

Bitcoin spot ETFs led the session with $66.19 million in net inflows, a positive figure indicating that more money entered Bitcoin funds than left them during the trading day. Solana spot ETFs also finished in positive territory, recording $5.44 million in net inflows.

Ethereum moved in the opposite direction. Spot ETH ETFs posted $2.81 million in net outflows, making Ethereum the only one of the three reported assets to end the session with negative flows.

Bitcoin and Solana ETFs Attract Capital

The latest September 29 ETF flows show a clear difference in the amount of capital attracted by Bitcoin and Solana products. Bitcoin's $66.19 million inflow was more than 12 times Solana's $5.44 million total. Combined, BTC and SOL spot ETFs attracted approximately $71.63 million during the session. Solana's $5.44 million figure, while far smaller than Bitcoin's, still placed SOL products firmly in positive territory for the day.

After accounting for Ethereum's $2.81 million outflow, the three categories recorded a combined net inflow of roughly $68.82 million.

ETF flows are closely monitored because they provide a daily view of investor activity through regulated crypto investment products. Spot crypto ETFs hold the underlying asset directly and trade on U.S. exchanges, giving traditional investors exposure to digital assets without directly holding tokens. Because the figures are compiled from daily creations and redemptions across individual funds, they also offer a consistent way to compare demand for one asset against another, and to track how that demand shifts from session to session. Net inflows occur when creations outweigh redemptions, while net outflows signal the reverse. However, a single session does not necessarily establish a longer-term trend.

ETF FLOWS: BTC and SOL spot ETFs saw net inflows on Sept. 29, while ETH spot ETFs saw net outflows. BTC: $66.19M ETH: – $2.81M SOL: $5.44M pic.twitter.com/9rl4qQsLC6

— Cointelegraph (@Cointelegraph) September 30, 2026

Ethereum ETFs Record Modest Outflows

While BTC and SOL attracted new capital, Ethereum's $2.81 million net outflow was relatively small compared with Bitcoin's inflow for the day. Daily ETF numbers can move between positive and negative territory as investors add or redeem shares. As a result, traders typically examine flows over several sessions rather than relying on one day's figures alone.

The September 29 ETF flows ultimately showed positive overall activity across the three reported assets, primarily driven by Bitcoin. For the session, BTC led with $66.19 million in inflows, SOL added $5.44 million, and ETH recorded $2.81 million in outflows. The session's figures were highlighted in a flow summary published by Cointelegraph on X, and upcoming daily flow reports will show whether the Sept. 29 split — Bitcoin and Solana in positive territory, Ethereum negative — held across subsequent sessions.

Source: CoinoMedia