Chiara Bianchi
The U.S. spot Bitcoin ETF market is experiencing an extraordinary wave of investment, with a 10-day inflow streak hitting $4.26 billion as of May 28. Driving this surge is BlackRock’s iShares Bitcoin Trust (IBIT), which remains the clear leader in the sector.
According to data from PRIME, Wednesday alone saw $432.7 million in new flows into the sector — and IBIT accounted for $481 million, making it the only ETF with positive flows for the day. In contrast, Ark Invest’s ARKB and Fidelity’s FBTC recorded net outflows of $34.3 million and $14 million, respectively, while other funds remained flat.
Over the 10-day streak, BlackRock’s IBIT was responsible for $4.09 billion, representing a staggering 96% of total inflows. Since the spot Bitcoin ETFs launched in January 2024, the sector has attracted $45.6 billion — yet IBIT alone has drawn $49 billion since its debut.
This performance has far outpaced rivals, especially as Grayscale’s GBTC fund continues to shed assets, recording $23.1 billion in outflows, largely due to its higher fees and post-conversion structure.
IBIT’s Unbroken 33-Day Streak Shows No Signs of Slowing
IBIT is on a personal hot streak — the fund has recorded 33 straight days without a single net outflow since April 9, with only three zero-flow days during that stretch. Over this period, it has pulled in $9.31 billion, pushing its total assets under management to $72 billion.
“IBIT is seeing nearly $500 million in daily inflows. It’s among the top five ETFs by year-to-date inflows out of more than 4,200 ETFs,” said Nate Geraci, President of The ETF Store.
Bloomberg’s Senior ETF Analyst Eric Balchunas added: “IBIT now holds $72 billion in assets, ranking 23rd among all ETFs — an unbelievable feat for a fund that’s just one year old.”
Spot Bitcoin ETF Trading Volumes Stay Hot
Market enthusiasm isn’t limited to inflows. Trading volumes remain high, with over $25 billion exchanged last week as Bitcoin hit an all-time high of $112,000. On Wednesday alone, the spot Bitcoin ETFs recorded $3.4 billion in trading, with IBIT contributing $2.6 billion, claiming nearly 80% of market share.
Currently, Bitcoin trades at $108,492, according to PRIME.
Ethereum ETFs Gain Traction with $394M in 8-Day Streak
While Bitcoin ETFs dominate headlines, spot Ethereum ETFs are quietly making gains. On Wednesday, the Ethereum ETF group brought in $84.9 million, led by BlackRock’s ETHA with $52.7 million in inflows.
Other notable contributions came from:
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Fidelity’s FETH: $25.7 million
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Grayscale’s ETH: $4.9 million
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Invesco’s QETH: $1.6 million
In total, Ethereum ETFs have now seen $394.1 million in inflows over the past eight days, with $2.9 billion in cumulative flows and $446.9 million in daily trading volume.
