Institutional flow through the spot ETF channel turned decisively positive on Monday, with Bitcoin attracting meaningful demand while Ethereum continued to bleed.
Bitcoin ETFs
According to data from SoSoValue, US spot Bitcoin ETFs recorded a combined net inflow of $167.23 million on March 24, representing 2,360 BTC added across the product suite. BlackRock led the buying with 2,270 BTC worth $160.89 million in net inflows, accounting for 96% of the total Bitcoin ETF demand for the session on its own. Fidelity added 588 BTC worth $41.70 million. ARK 21Shares recorded an outflow of 133 BTC worth $9.41 million, the only Bitcoin ETF issuer to register negative flow on the day.
BlackRock’s dominance of the Bitcoin’s inflows continues the pattern visible throughout past week’s reporting, where IBIT has consistently acted as the primary destination for institutional Bitcoin demand through the ETF channel while other issuers produce mixed results around it. The net $167.23 million inflow is the strongest single-session Bitcoin ETF figure in the recent window and represents a meaningful reversal from the persistent outflow environment that characterized much of March.
Ethereum ETFs
Spot Ethereum ETFs recorded a combined net outflow of $16.18 million on March 24, representing 7,484 ETH leaving the products on a net basis. BlackRock’s ETHA sold 6,502 ETH worth $14.57 million, accounting for the majority of the Ethereum outflow. Fidelity sold 748 ETH worth $1.62 million. Grayscale sold 365 ETH worth $25.87 million, though the dollar figure appears to reflect a separate calculation methodology given its size relative to the ETH volume. No Ethereum ETF issuer recorded positive flow on the session.
The Ethereum outflow of $16.18 million is smaller in absolute terms than the daily Ethereum ETF redemptions recorded earlier in the week, suggesting the pace of institutional selling from Ethereum products is decelerating even if the direction has not yet reversed. The split between strong Bitcoin inflows and continued Ethereum outflows on the same day mirrors the weekly pattern covered in earlier reporting, where BlackRock simultaneously bought Bitcoin and sold Ethereum, reflecting active reallocation rather than uniform crypto exposure management.
The Rest of the Landscape
XRP, LINK, SOL, LTC, DOGE, DOT, HBAR, and AVAX all recorded zero flow for the session according to SoSoValue data. The complete absence of activity across the entire altcoin ETF category on a day when Bitcoin ETFs recorded their strongest inflow session in recent memory reflects the continued concentration of institutional demand in Bitcoin as the primary digital asset allocation vehicle.
The Total
Combined US spot crypto ETF net inflows on March 24 reached approximately $151.05 million. Bitcoin ETFs contributed $167.23 million while Ethereum ETFs offset $16.18 million of that figure. The net positive result is the largest combined daily inflow in the recent window and arrives on the same day Bitcoin reclaimed the $71,000 level on the hourly chart, suggesting the institutional flow and the price recovery are drawing from the same underlying demand dynamic rather than moving independently.
