U.S.-listed spot Bitcoin ETFs recorded a net inflow of roughly $338 million on Monday, extending their winning streak to six consecutive trading days. The latest inflow brought the combined total across the six-session stretch from Aug. 17 through Aug. 24 to $2.26 billion.

Total net assets across the category have also risen to about $98.6 billion, while cumulative net inflows since the funds launched in January 2024 — after the U.S. Securities and Exchange Commission approved the first spot Bitcoin ETFs, capping more than a decade of applications and rejections — reached $54.0 billion.

Bitcoin ETF Flow, Coinglass

BlackRock’s iShares Bitcoin Trust, or IBIT, remains the main driver of the inflow streak. IBIT attracted another $209 million on Aug. 24, taking its six-session intake to roughly $1.54 billion. That represents about 68% of the $2.26 billion flowing into U.S. spot Bitcoin ETFs since last week, reinforcing its position as the leading institutional vehicle for regulated Bitcoin exposure.

That concentration remains notable as Bitcoin moves toward the $80,000 level. The latest ETF demand suggests institutional appetite has not faded after last week’s sharp rally, although the pace of inflows will now be tested as the market moves beyond the initial surge.

Bitcoin ETF assets also climbed sharply alongside the price rally, meaning part of the increase in assets reflects Bitcoin’s appreciation rather than fresh capital alone.

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Bitcoin ETF Inflows: What the $1.9 Billion Streak Shows

The six-day run was uneven across sessions. On Aug. 17, total net inflows of $297.5 million included $160.2 million from IBIT, or about 54% of that day’s total. Aug. 18 brought a smaller overall total of $189.3 million, but IBIT’s $143.6 million share rose to roughly 76%.

Aug. 19 saw the category’s largest single-day print at that point, with $517.2 million in total inflows. IBIT contributed $284.7 million, or about 55%.

Aug. 20 was the standout session. Total inflows jumped to $606.3 million, and IBIT alone brought in $503.0 million, an 83% share.

Fidelity’s FBTC added $64.7 million, Bitwise’s BITB brought in $26.4 million, ARK 21Shares’ ARKB contributed $12.2 million, and Invesco Galaxy’s BTCO added $3.6 million, while VanEck’s HODL posted a $3.6 million outflow.

BlackRock Leads $338 Million Bitcoin ETF Inflow as Ether Funds Add $116 Million U.S. spot Bitcoin ETFs recorded $338 million in net inflows on Aug. 24, led by BlackRock’s IBIT with $209 million, while spot Ether ETFs attracted $116 million, with BlackRock’s ETHA accounting for… pic.twitter.com/vd38qplHpR — Wu Blockchain (@WuBlockchain) August 25, 2026

The Ether inflows run through a parallel wrapper: spot Ether ETFs began trading in the U.S. in July 2024, and their daily prints are tracked alongside Bitcoin flows as a second read on institutional appetite for crypto exposure through exchange-traded products.

Friday’s close on Aug. 21 added another $307.5 million, with IBIT’s $239.3 million representing about 78% of that session. The momentum continued on Monday, Aug. 24, when spot Bitcoin ETFs recorded another $337.6 million in net inflows.

IBIT again led with $209 million, while FBTC added $105 million. That pushed the six-session total from Aug. 17 through Aug. 24 to roughly $2.26 billion, extending the category’s inflow streak to six consecutive trading days.

The available data show that while other funds, particularly FBTC, BITB, and ARKB, also posted positive days during the streak, none approached IBIT’s cumulative scale. IBIT accounted for roughly $1.54 billion of the $2.26 billion flowing into U.S. spot Bitcoin ETFs across the six sessions, or about 68%.

The concentration underscores how much fresh institutional demand is currently routed through BlackRock’s wrapper rather than being spread evenly across the roughly dozen products now trading — a universe created in a single regulatory sweep in January 2024, when the SEC cleared 11 spot Bitcoin funds at once, including Grayscale’s converted Bitcoin Trust.

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Why BlackRock’s IBIT Is Driving Institutional Bitcoin Demand

IBIT’s dominance matters because of what it represents structurally. As a regulated, exchange-traded product, IBIT gives pensions, RIAs, and traditional brokerage accounts a way to gain Bitcoin exposure without using a crypto exchange, a self-custody wallet, or a futures account.

According to CoinMarketCap Academy’s reporting on the broader Bitcoin ETF complex, IBIT has held 809,870 BTC, representing more than 60% of assets under management across the spot Bitcoin ETF category.

The fund also carries its own listed options, which began trading on Nasdaq in November 2024, giving traders a way to position through the ETF itself:

$IBIT Bitcoin ETF set record call volume on Wed, with huge volume continuing Thur/Fri. Call Skew rank 98/100 (extreme) pic.twitter.com/DcDUO3uiei — SpotGamma (@spotgamma) August 24, 2026

Prior coverage of BlackRock-led ETF demand has tracked this buildup as it accumulated over multiple quarters.

Creation-unit flows into IBIT and its peers represent actual dollars converted into custodied Bitcoin through an authorized-participant process, a different mechanism from short covering on derivatives exchanges or leveraged futures positioning, which can reverse in hours.

A five-day stretch of $1.9 billion in net creations is a sign of allocators putting new capital to work, not traders unwinding bearish bets.

That said, the same concentration that makes IBIT the most visible gauge of institutional demand also concentrates risk. A market where roughly 69% of new flows run through a single issuer, custodian, and product structure is more exposed to idiosyncratic shocks. IBIT’s Bitcoin is held by Coinbase Custody per the fund’s prospectus, which means the majority of the category’s assets — by virtue of IBIT’s more-than-60% share of assets under management — already sit with a single custodian before any new flow arrives.

The next checkpoints are observable rather than predictive: the daily creation and redemption tallies that public trackers such as Farside Investors publish each evening, and whether the six-session streak holds as the market moves beyond the initial rally.

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