Bitcoin ETFs Just Had Their Biggest Day Since May—BlackRock Took 83% of It

U.S. spot Bitcoin ETFs pulled in $606.29 million on Thursday, their biggest single-day haul since May 1, according to SoSoValue, as reported by Decrypt on August 21, 2026. The day extended an inflow streak to four sessions that totaled roughly $1.61 billion. BlackRock's IBIT collected $502.99 million of Thursday's money, about 83 cents of every dollar that entered the category, up sharply from a 55% share on Wednesday. Fidelity's FBTC took $64.74 million, Bitwise's BITB $26.4 million and Ark and 21Shares' ARKB $12.2 million, while VanEck's HODL shed $3.59 million. August now stands at $2.07 billion, the best month of 2026.

Background

Decrypt describes spot Bitcoin ETFs as instruments that give investors exposure to an asset without directly owning it: the issuer holds the coin and the investor owns a 1:1 equivalent, gaining exposure to Bitcoin's price in real time. The funds have been extremely popular since launching in early 2024, with BlackRock, described as a $15 trillion asset manager, the primary beneficiary. The article notes that IBIT's dominance on Thursday was closer to the pattern from earlier in August, when the funds drew $853.5 million over five days and roughly 80% arrived through IBIT. The same session saw money broaden across other assets: Ethereum ETFs added almost $221 million, their largest single-day intake since October 2025 and a fourth consecutive positive session, while XRP funds took $13 million against $2.35 million on Wednesday and Solana funds took $15 million against $2.10 million. Every listed asset drew inflows, including Hyperliquid's product, which had been the lone outflow a day earlier. The source also notes that consolidation claimed a fund this month: Hashdex shut its DEFI Bitcoin ETF, described as the first US spot Bitcoin fund ever liquidated, with a final trading day of August 17.

What happened

According to Decrypt, citing SoSoValue, U.S. spot Bitcoin ETFs pulled in $606.29 million on Thursday, beating Wednesday's $517.19 million and marking the biggest single-day haul since May 1. The four-day run comprised $297.56 million on Monday, $189.30 million on Tuesday, then Wednesday and Thursday, for roughly $1.61 billion in all. August reached $2.07 billion, the best month of 2026, beating April's $1.97 billion with seven trading sessions left. Within Thursday's total, BlackRock's IBIT collected $502.99 million, roughly 83% of the category's inflows, compared with a 55% share on Wednesday, when eight of 12 funds finished positive and none were in the red. Fidelity's FBTC took $64.74 million, Bitwise's BITB $26.4 million and Ark and 21Shares' ARKB $12.2 million, while VanEck's HODL shed $3.59 million. Across the four sessions, IBIT accounted for about $1.09 billion of the $1.61 billion. Ethereum ETFs added almost $221 million, their largest single-day intake since October 2025 and a fourth straight positive session. XRP funds took $13 million and Solana funds $15 million, and every listed asset drew inflows. The source also reports that Hashdex shut its DEFI Bitcoin ETF, the first US spot Bitcoin fund ever liquidated, with a final trading day of August 17; it charged the same 0.25% as IBIT but held $14.7 million against IBIT's $47 billion, throwing off roughly $26,000 a year in fees.

Market impact

Decrypt reports that Bitcoin traded around $77,000 on Friday after challenging $80,000 overnight and touching roughly $79,400. It cleared $69,000 on Wednesday and $72,000 on Thursday and is up about 24% since Monday, its best week since 2023, while still sitting some 38% below the record above $126,000 set in October 2025. The chart has not flipped: Bitcoin's death cross has held since November 16, 2025, and while price climbed back above the 200-day simple moving average at $69,005, the 50-day sits at $63,976, meaning it needs to cover roughly $5,000 more before a golden cross completes. Ethereum changed hands near $2,357 and XRP around $1.38, extending what the source calls its best week since the 2024 election pump to a roughly 38% gain. The move began with the Treasury's decision to at least double long-end bond buybacks, then accelerated through a squeeze that liquidated $3 billion in shorts, according to the article. On relative flows, Bitcoin funds collected one dollar for every $220 that reached XRP funds on Wednesday; on Thursday that gap closed to about 47 to one.

Why it matters

The sources support several consequences. First, concentration: IBIT took about $1.09 billion of the four-day $1.61 billion, and Thursday's 83% share shows the category's growth increasingly runs through a single issuer, echoing the roughly 80% pattern from earlier in August. Second, scale matters for survival: Hashdex's DEFI Bitcoin ETF, charging the same 0.25% as IBIT but holding $14.7 million against IBIT's $47 billion and throwing off roughly $26,000 a year in fees, became the first US spot Bitcoin fund ever liquidated, with a final trading day of August 17. Holders past that date lost their exchange exit and are owed a cash payment at net asset value, dated either August 24 or August 28 depending on which Hashdex filing you read, minus closing costs and adjusted for Bitcoin's price while the fund sells its remaining 225 coins. Third, the money broadened across assets even as it narrowed within Bitcoin: Ethereum ETFs' nearly $221 million was their largest day since October 2025, and XRP and Solana products jumped from Wednesday's levels.