According to SoSoValue data, on May 8, U.S. Eastern Time, U.S. spot Bitcoin ETFs recorded a total net outflow of $146 million, with Fidelity’s FBTC being the largest net outflow on the day at $97.6041 million; on the same day, Ethereum spot ETFs recorded a net inflow of $3.5747 million.
Bitcoin Spot ETF Net Flows on May 8
(Source: SoSoValue)
According to SoSoValue data, on May 8, 2026, the key indicators for Bitcoin spot ETFs are as follows:
Total net outflow (single day): $146 million
Largest net outflow (single day): Fidelity FBTC, net outflow of $97.6041 million; FBTC’s historical total net inflow has reached $8B
Largest net inflow (single day): Morgan Stanley ETF (MSBT), net inflow of $5.7385 million; MSBT’s historical total net inflow has reached $194 million
Market-wide overall scale: Bitcoin spot ETF total assets net asset value at $8B
ETF net asset ratio (market cap share of total Bitcoin market cap): 6.67%
Historical total net inflow: $11.13B
Ethereum Spot ETF Net Flows on May 8
According to SoSoValue data, on May 8, 2026, the key indicators for Ethereum spot ETFs are as follows:
On the day, total net inflow was $3.5747 million, all coming from BlackRock Staked ETH ETF (ETHB), net inflow of $3.5747 million; ETHB’s historical total net inflow has reached $82.7645 million. Ethereum spot ETF total assets net asset value reached $106.61B; the ETF net asset ratio (market cap share of total Ethereum market cap) was 4.94%; historical total net inflow was $59.34B.
Background on This Week’s Fund Flows
According to a report by CoinTelegraph on May 8, 2026, as of the prior two trading days of this week, U.S. spot Bitcoin ETFs collectively attracted nearly $1 billion in net inflows; meanwhile, Bitcoin market share rose to 61% over the same period, the highest level in recent years.
FAQ
What are the data sources and specific figures for the May 8, 2026 Bitcoin spot ETF fund flow data?
According to data disclosed by SoSoValue on May 9, 2026, on May 8, 2026 (U.S. Eastern Time), U.S. spot Bitcoin ETFs recorded a total net outflow of $146 million; Fidelity FBTC had a single-day net outflow of $97.6041 million, while Morgan Stanley MSBT had a single-day net inflow of $5.7385 million.
What is the current total asset size and historical total net inflow of Bitcoin spot ETFs?
According to SoSoValue data, as of the time of the May 9, 2026 report, Bitcoin spot ETFs’ total assets net asset value reached $13.73B, the ETF net asset ratio was 6.67%, and historical total net inflow reached $12.09B.
What are the main contributors to the net inflow of Ethereum spot ETFs on May 8?
According to SoSoValue data, on May 8, 2026, Ethereum spot ETFs recorded a net inflow of $3.5747 million, all from BlackRock Staked ETH ETF (ETHB); ETHB’s historical total net inflow has reached $82.7645 million, and Ethereum spot ETF total assets net asset value reached $106.61B.
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