US Spot Bitcoin ETFs Eye Best Week in 6 on $1.1B in 3 Days

What to Know

$1.1 billion — US spot bitcoin ETFs recorded three straight days of net inflows, their strongest stretch since mid-January
$652 million — BlackRock's IBIT accounted for more than half of the total three-day haul
1.29 million BTC — Total ETF holdings now sit within 10% of their October peak, according to Checkonchain data
The Coinbase Premium Index turned positive after 40 days in negative territory, signaling renewed US institutional demand

US spot bitcoin ETFs are poised for their strongest weekly performance in six weeks after attracting $1.1 billion in net inflows over three consecutive sessions, according to SoSoValue data. After accounting for Monday's net redemptions, the funds sit roughly $815 million in the green for the week, the healthiest tally since the $1.4 billion haul recorded during the week ending January 16.

BlackRock IBIT Captures Half of Bitcoin ETF Inflows

BlackRock's iShares Bitcoin Trust, known as IBIT, captured more than half of the three-day total, pulling in approximately $652 million, according to SoSoValue.

Meanwhile, Grayscale's GBTC — the fund carrying the steepest management fee among its peers — logged its largest single-day net intake since it converted from a closed-end trust structure to an ETF format.

What Does the Coinbase Premium Index Signal for US Demand?

The rebound in ETF allocations coincides with the Coinbase Premium Index flipping positive after 40 days in negative territory, a shift that reinforces the narrative of strengthening domestic appetite.

The metric tracks the spread between the bitcoin price on Coinbase, the primary on-ramp for American institutions, and the broader global spot market. It is widely used as a gauge of US institutional flows and sentiment.

ETF Holdings Approach October Peak

On-chain data from Checkonchain reveals that cumulative bitcoin holdings across all US spot ETFs have climbed to 1.29 million BTC, placing aggregate assets under management within 10% of the October high-water mark.

The recovery in AUM is particularly notable given that bitcoin's spot price remains roughly 45% below its October record, with the largest cryptocurrency consolidating around the mid-$60,000 range throughout this week.

Declining CME Open Interest Points to Outright Longs

Open interest on the Chicago Mercantile Exchange has continued sliding, falling to 107,780 BTC, according to Glassnode. Because CME futures let institutions pair a long spot position with a short futures leg — a strategy known as a basis trade — the declining exposure suggests recent ETF purchases represent outright bullish bets rather than hedged arbitrage.

Even so, positioning in both futures and options markets indicates that traders are actively seeking downside protection against further price declines.