Solana ETFs Log 12th Week of Inflows as Bitcoin Hits Record Quiet

Spot Solana ETFs recorded 12 consecutive weeks of net inflows, with the Bitwise Solana Staking ETF (BSOL) attracting $48 million in a single Friday session. This persistence occurred despite a Federal Reserve rate hike and the Senate's rejection of the CLARITY Act, developments that typically pressure digital asset markets.

According to SoSoValue, Solana spot ETFs added $13.2 million during the week ending September 18, 2026. Daily inflows were modest but consistent, with no negative sessions. On September 14, funds gained $11.01 million; on September 15, they added $1.35 million; and on September 16, they took in $836,926. September 17 closed with no change. The streak continued through the week, enduring a macroeconomic environment that included the Fed raising its target range by 25 basis points to an upper bound of 3.75% to 4.00% on September 16.

In contrast, Bitcoin spot ETFs netted only $6.2 million over the same period, marking the smallest weekly inflow figure in the funds' 141 weeks of trading since their launch on January 11, 2024. While the net figure appeared quiet, Bitcoin funds experienced significant churn, with gross movements reaching $1.499 billion. The week saw inflows of $752.52 million across three positive sessions and outflows of $746.31 million across two negative sessions.

Bitcoin ETF flows swung sharply between inflows and outflows during the trading week. After an initial $160.04 million inflow on September 14, the funds shed $450.33 million on September 15 and another $295.98 million on September 16. The trend then reversed, with funds gaining $159.45 million on September 17 and $433.03 million on September 18. The Fidelity Wise Origin Bitcoin Fund (FBTC) saw the largest single-day inflow of $310.7 million, while the iShares Bitcoin Trust (IBIT) added $108 million on Friday.

The structural difference between the two asset classes influences investor behavior. Solana can be staked, allowing holders to lock coins to validate transactions and earn a return. The Bitwise Solana Staking ETF (BSOL) stakes the coins it holds and passes the proceeds to shareholders, providing a running yield on top of token exposure. BSOL was the only Solana fund with disclosed inflows for the week, and its shares closed 12.12% higher during the five-day stretch, ahead of SOL's own 11.29% gain.

Bitcoin funds hold an asset that pays no yield, causing flows to track sentiment closely. The large size of Bitcoin funds amplifies this effect; with cumulative inflows of $55.16 billion and net assets of $102.53 billion, compared to Solana's $1.37 billion in cumulative inflows and $1.42 billion in net assets, large allocators can trade in both directions within a single week.

The divergence in flows highlights different market dynamics. Solana's performance has been consistent, with committed buyers holding through regulatory and monetary news events. Bitcoin's flows, however, remain highly reactive to macroeconomic surprises, as demonstrated by the mid-week losses that were largely recouped by the end of the trading period.