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Bitcoin exchange-traded funds (ETFs) in the United States recorded their strongest inflow streak of 2026 last week, with BlackRock’s iShares Bitcoin Trust capturing the majority of new capital. Data compiled by SoSoValue’s Bitcoin ETF dashboard shows US spot Bitcoin ETFs attracted roughly $763 million in net inflows between March 9 and March 13.
BlackRock’s IBIT alone drew over $600 million across the five-day stretch. The concentration of flows shows how IBIT has become the primary vehicle for institutional Bitcoin exposure in regulated markets.
The weekly inflow streak marked the first uninterrupted run of daily net inflows for US spot Bitcoin ETFs in 2026.
According to on-chain analytics platform Arkham Intelligence, IBIT accounted for more than 78% of total net inflows during the period, reinforcing BlackRock’s position as the largest institutional buyer through ETF markets.
BLACKROCK BOUGHT $600M OF BTC IN A WEEK
ETF breakdown:
BTC Net flow: +$763.4M INFLOW
Biggest buyer: BlackRock IBIT (+$600.1M)
Biggest seller: Grayscale GBTC (-$25.9M)ETH Net flow: +$160.9M INFLOW
Biggest buyer: Fidelity FETH (+$90.1M)
Biggest seller: Grayscale ETHE (-$13.4M)… pic.twitter.com/YOC5tCoKTk— Arkham (@arkham) March 16, 2026
Grayscale’s GBTC moved in the opposite direction. The fund posted about $25.9 million in net outflows during the same week, continuing a pattern in which capital rotates away from older trust structures toward lower-fee ETF alternatives.
This divergence reflects how institutional demand has shifted since US spot Bitcoin ETFs launched in January 2024.
The inflow surge arrived as Bitcoin pushed above $74,000 – its highest level since early February 2026. Market data from TradingView shows BTC climbed nearly 5% within 24 hours during the rally before stabilizing near the $73,000 range.
Derivative markets amplified the move. As Bitcoin crossed the $74,000 level, more than $127 million in short positions were liquidated within hours, according to liquidation tracking data from Coinglass.
This inflow streak followed a choppy period where Bitcoin consolidated between $60,000 and $65,000, proving that institutional buyers were actively accumulating the dip well before the breakout.
The pattern has appeared several times since spot ETFs launched in the US in 2024. When large inflows arrive through regulated funds, they create sustained purchasing pressure that can tighten market liquidity.
Bitcoin recently moved back above its 50-day moving average near $71,000, a level widely watched by traders as a signal of medium-term momentum. Breaks above this indicator have historically preceded periods of stronger price movement, though the follow-through hasn’t always been consistent.
The next psychological level for traders sits near $75,000, where derivatives positioning is indicative of increased volatility if prices continue to climb.
Recent ETF data shows institutional demand remains a major driver of market liquidity. With BlackRock’s IBIT vacuuming up the vast majority of recent ETF inflows, the fund’s daily allocation pace is no longer just a metric – it’s the definitive barometer for institutional Bitcoin appetite.
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