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U.S. spot Bitcoin ETFs recorded total net inflows of $108 million on July 15, with BlackRock's IBIT posting the largest single-day inflow at $80.82 million, according to SoSoValue data. The session keeps IBIT at the top of the spot BTC ETF leaderboard by assets and continues a streak of BlackRock-led days that has defined much of 2025 flow.
Why it matters
Spot Ethereum ETFs drew $53.83 million in the same session, led by BlackRock's ETHA with $45.29 million. When a single issuer accounts for roughly 75% of BTC flow and over 84% of ETH flow in a single day, the signal is concentration, not breadth. The rest of the issuer roster is no longer driving the bid on its own.
Market impact
The pattern reinforces the post-launch reality that BlackRock is effectively the spot ETF complex's marginal buyer. Smaller issuers add incremental dollars, but the cumulative tape is increasingly a one-firm story, which tightens the correlation between IBIT net flow and BTC spot price action and makes any future IBIT outflow the cleanest leading indicator for the sector.
Frequently asked questions
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How much did U.S. spot Bitcoin ETFs pull in on July 15?
Total net inflows reached $108 million, with BlackRock's IBIT accounting for $80.82 million of that, per SoSoValue data.
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How much did spot Ethereum ETFs take in the same session?
Spot ETH ETFs drew $53.83 million in net inflows on July 15, led by BlackRock's ETHA with $45.29 million.
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Why is BlackRock's share of flows significant?
One issuer captured roughly 75% of BTC ETF inflows and 84% of ETH ETF inflows in a single session, signaling concentration rather than broad-based demand across the issuer roster.
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What does IBIT dominance mean for spot BTC price action?
It tightens the correlation between IBIT net flow and BTC spot moves, because BlackRock is now the marginal buyer in the complex, making IBIT outflow days the cleanest leading indicator for the sector.
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Who publishes the daily ETF flow data cited here?
SoSoValue, a tracker widely used for daily U.S. spot Bitcoin and Ethereum ETF flow data, is the source for both the BTC and ETH figures.
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