The recent surge in popularity of the first US-listed spot Solana exchange-traded fund (ETF) has caught the attention of investors, with $21 million in net inflows recorded on July 8 alone. This brings the total inflows for the Rex-Osprey’s Solana + Staking ETF (SSK) to $41.2 million, according to data from Farside Investors.
The rapid growth of SSK is notable, especially considering that it only began trading on July 2 with a 0.75% management fee, which is higher than the fees charged by BlackRock and Fidelity on their Bitcoin (BTC) and Ethereum (ETH) products. Despite the higher fee, investors seem eager to get in on the Solana action.
When comparing the initial trading days of SSK to Bitcoin and Ethereum ETFs, there is a clear difference in the level of inflows relative to the market capitalization of the underlying assets. Bitcoin spot ETFs saw around $2.9 billion in inflows in their first four sessions, representing 0.34% of BTC’s market cap at the time. Similarly, Ethereum spot ETFs attracted nearly $1.2 billion in their first four days, equivalent to 0.3% of Ether’s market value.
In contrast, Solana’s $41.2 million inflows account for approximately 0.05% of SOL’s circulating supply, significantly lower than the penetration levels seen with Bitcoin and Ethereum launches. One factor contributing to this discrepancy is the higher fee charged by Rex-Osprey, as well as the single-issuer structure of the Solana ETF.
While the higher cost and limited issuer options may have initially hindered SSK’s uptake, the fund’s recent doubling of net inflows on July 8 indicates a growing interest from investors despite the expenses. This suggests that there is a demand for exposure to Solana within the ETF market, even at a higher cost.
Overall, the success of the Solana ETF highlights the increasing appetite for alternative cryptocurrencies and investment products in the market. As the crypto ecosystem continues to evolve, we can expect to see more innovative offerings and investment opportunities emerge for investors looking to diversify their portfolios.

