U.S. spot crypto ETFs opened the week with broad inflows on September 21, led by $999 million into Bitcoin funds, as institutional demand accelerated alongside Bitcoin’s surge above $86,000.
Ether ETFs added another $270 million, while Solana products attracted $26 million, taking combined net inflows across the three categories to approximately $1.295 billion for the session.
The Bitcoin figure represents a sharp acceleration from Friday, September 18, when the category attracted $433 million. Ether inflows also nearly doubled from Friday’s $143.7 million, although Solana slowed from $47.6 million. Across Friday and Monday alone, Bitcoin ETFs have now absorbed $1.432 billion of new capital.
The inflows coincided with a powerful crypto rally. Bitcoin climbed more than 6% on Monday and traded above $86,000, its highest level since January, while crypto-linked equities also advanced.
BlackRock, ARK and Fidelity Drive Bitcoin Surge
BlackRock’s IBIT led Monday’s Bitcoin flows with $381.4 million, followed by ARK Invest and 21Shares’ ARKB with $289.1 million and Fidelity’s FBTC with $238.8 million. Together, the three funds accounted for $909.3 million, or roughly 91% of the category’s total.
Bitwise’s BITB added $21.6 million, while Morgan Stanley’s MSBT attracted a record $61.7 million. Grayscale also finished positive: GBTC recorded $3.3 million and its lower-fee Bitcoin Mini Trust added $3.1 million. Invesco, Franklin Templeton, Valkyrie, VanEck and WisdomTree recorded no net flows.
Notably, every Bitcoin ETF reporting a non-zero flow was positive. The $999 million session lifted cumulative net inflows into the category to approximately $56.23 billion.
Monday also extended Friday’s turnaround following heavy withdrawals earlier in the previous week, including $450.4 million on September 15 and $295.9 million on September 16.
Ether and Solana Join the Inflow Wave
Ether ETFs produced an equally broad-based recovery, attracting $270 million with no fund reporting an outflow.
BlackRock’s ETHA led at $110.1 million, followed by Fidelity’s FETH at $73 million and Grayscale’s Ethereum Mini Trust at $59.3 million. BlackRock’s staking-enabled ETHB added $12.8 million, while ETHE, ETHW, TETH and Morgan Stanley’s MSSE recorded smaller positive flows. Cumulative Ether ETF net inflows reached approximately $13.55 billion.
Solana funds extended their own positive streak with $26 million. Bitwise’s BSOL contributed $14.4 million and Grayscale’s GSOL added $7.8 million, while Fidelity, Franklin Templeton and Morgan Stanley products also attracted capital.
The latest session is notable not simply for its size but for its breadth. Friday’s Bitcoin rebound was heavily concentrated in Fidelity; Monday brought substantial demand simultaneously across BlackRock, Fidelity and ARK, while Ether and Solana funds also finished firmly positive.
After the sharp redemptions surrounding last week’s Federal Reserve rate increase, September 21 therefore marks a decisive reversal in daily ETF positioning, with nearly $1.3 billion flowing into the three major U.S. crypto ETF categories in a single session.
