Solana ETFs Extend Inflow Streak to 12 Weeks as Bitcoin Funds Post Their Slowest Week in 141 Weeks of Trading

Since Bitcoin spot ETFs began trading on January 11, 2024, they have run for 141 straight weeks, according to 24/7 Wall St., citing data from SoSoValue. The week ending Friday, September 18, 2026, was the weakest of that entire stretch. Net inflows came in at just $6.1 million to $6.2 million, depending on whether you're reading Crypto Briefing or 24/7 Wall St., both citing the same SoSoValue dataset. Trading volume across all Bitcoin spot ETFs sank to its lowest full five-day total since October 2024.

While Bitcoin funds went quiet, Solana spot ETFs just closed out their 12th consecutive week of net inflows, a streak that has pulled in more than $1.4 billion since it started and pushed total Solana ETF assets under management to roughly $1.62 billion, according to Crypto Briefing.

Where the money is actually going

Bitwise's BSOL, a staking ETF that passes SOL staking rewards through to shareholders, has captured about 80% of all Solana ETF inflows, per Crypto Briefing and a matching report from TradingView. That's a real structural edge. Investors get SOL price exposure plus a yield stream competitors can't easily replicate. Grayscale's GSOL, Fidelity's FSOL, VanEck's VSOL, and Morgan Stanley's MSOL are splitting what's left.

SOL itself has responded, trading between $110 and $112 in mid-September, its highest level in roughly seven months.

The reporting gets messy here. Crypto Briefing and TradingView both report the week ending September 18 saw $60.7 million in Solana ETF inflows, with $47.6 million of that landing on the final trading day alone. But 24/7 Wall St., citing the same SoSoValue source, put that week's Solana inflow at $13.2 million. Those numbers don't reconcile, and none of the sources explain the gap. It's possible the discrepancy comes down to different cutoff times or which Solana products get counted, but readers should treat the exact weekly figure as uncertain even though the 12-week streak itself is consistent across every outlet.

Don't confuse a quiet week with a dying asset

The most important number missing from the celebratory Solana coverage comes from Indy Finance, which noted that even during Bitcoin's quietest ETF week on record, Bitcoin ETF holdings climbed to 6.29% of all bitcoin in circulation. That's not a fund category running out of gas. That's a fund category that already owns a massive, slow-growing chunk of the entire asset and doesn't need explosive weekly inflows to matter.

KuCoin's writeup makes the same point more directly: neither Crypto Briefing nor Yahoo Finance offered a specific cause for Bitcoin's slowdown, and analysts generally caution against reading too much into one quiet week. A calm week can mean reduced volatility, cautious positioning ahead of a macro event, or just a seasonal lull. It doesn't automatically mean money is leaving Bitcoin for Solana.

Indy Finance's own framing is the most disciplined of the bunch. If Bitcoin ETF inflows resume and outpace Solana's in the next reported week, the entire "rotation" narrative collapses. That's a fair test, and it hasn't happened yet.

Solana's ETF category is genuinely building momentum faster than Bitcoin's did in its first year, largely because Bitwise's staking product offers something Bitcoin ETFs structurally cannot. But Solana's $1.62 billion in total ETF assets is still a rounding error next to Bitcoin's ETF footprint, which now controls more than 1 in 16 bitcoins in existence. One quiet week doesn't erase that gap.

The next data point that will actually settle something is whether Bitcoin ETF inflows bounce back in the week ahead, or whether the outflow pattern that's shown up periodically in recent months resumes. Until then, this is a flow-of-funds story, not a verdict on either asset.