Bitcoin ETFs Attract $5.3B After U.S. Treasury Buyback Plan

U.S. spot Bitcoin ETFs have attracted approximately $5.3 billion in net inflows since the U.S. Treasury announced an expansion of its long-term Treasury buyback program on August 19, according to ETF analyst Nate Geraci.

The strong inflows have continued into September, even as U.S. Treasury yields have climbed sharply and Bitcoin has pulled back from its recent highs.

What Happened?

The latest data shows a significant acceleration in institutional demand for spot Bitcoin ETFs.

Key figures:

• $5.3B: cumulative Bitcoin ETF inflows since Aug. 19
• $2.4B: inflows during the week ending Sept. 25
• $999M: inflows on Sept. 21 alone
• $108.4B: combined ETF assets under management
• $934M: net Bitcoin ETF inflows since Jan. 1, after being negative earlier in 2026

The figures cover U.S. spot Bitcoin ETFs and exclude Ethereum and other crypto ETFs.

What Did the Treasury Change?

On August 19, the U.S. Treasury increased the ceiling for its so-called liquidity-support buybacks involving longer-dated Treasury securities.

From September 9 through November 4, individual operations can involve at least $4 billion, compared with a previous maximum of $2 billion, according to the Treasury's announcement.

The policy does not represent quantitative easing by the Federal Reserve.

The Treasury is buying previously issued longer-term debt while issuing more short-term debt. As a result, the overall amount of government debt does not automatically decline; the maturity composition changes instead.

Bitcoin Reacted Immediately

The Treasury announcement was followed by a notable Bitcoin move.

On August 19, BTC climbed from roughly $64,100 to $69,500 in less than 12 hours, an increase of about 8.2%.

The market also saw approximately $1.4 billion in Bitcoin short positions liquidated that day, adding to the upward move.

The subsequent ETF inflows suggest that the August reaction was followed by continued demand rather than being limited to a single trading session.

BlackRock and Fidelity Lead the Flows

The latest weekly data shows that the largest ETF providers captured much of the new capital.

For the week ending September 25:

• BlackRock IBIT: ~$1.2B
• Fidelity FBTC: ~$701.7M
• Total Bitcoin ETF inflows: ~$2.4B

The strongest day came on Monday, September 21, when approximately $999 million entered the funds. That ranked among the largest single-day inflow sessions since the ETFs launched in January 2024.

2026 ETF Balance Has Turned Positive

The latest inflows have also changed the broader 2026 picture.

Bitcoin ETFs were approximately $5.7 billion in net outflows for the year in July. By the end of the week covered in the report, that deficit had reversed into approximately $934 million of net inflows for 2026.

That turnaround indicates that the second-half recovery in ETF demand has been substantial.

But Treasury Yields Are Rising

There is an important counterpoint.

The U.S. 10-year Treasury yield recently reached approximately 5.17%, its highest level since 2007. Higher yields can increase the relative attractiveness of traditional fixed-income assets and create pressure on liquidity-sensitive assets such as Bitcoin.

Bitcoin also fell back toward $84,000 after reaching roughly $87,363 earlier in the week.

This creates an interesting divergence: Bitcoin ETF demand remains strong while long-term Treasury yields are also rising.

Is the Treasury Program Driving Bitcoin ETF Demand?

The timing suggests a possible relationship, but it does not prove causation.

Nate Geraci's $5.3 billion calculation measures ETF inflows after the August 19 announcement. Other factors — including Bitcoin's price momentum, institutional positioning, broader liquidity expectations and market sentiment — can also affect ETF flows.

The Journal du Coin analysis itself notes that the relationship has become less straightforward as Treasury yields have risen.

Key Bitcoin Price Levels

Level	Importance
$87,300	Recent local high
$85,000	Near-term psychological level
$84,000	Current market area
$80,000	Major psychological support
$77,000–$78,000	Deeper support zone

These are market reference levels, not guaranteed targets.

What Happens After November 4?

The Treasury's current expanded buyback framework runs through November 4.

After that date, the size of future operations will depend on the Treasury's next quarterly refinancing announcement. If buybacks return toward the previous $2 billion ceiling, one source of the market narrative surrounding the recent ETF inflows could weaken.

That makes the November refinancing announcement an important macro event for investors watching Bitcoin liquidity.

Bullish Scenario

Bitcoin could remain supported if:

• ETF inflows stay positive
• Institutional demand continues
• Treasury liquidity expectations remain supportive
• BTC holds above $80,000
• Broader risk appetite improves

Continued ETF accumulation would provide evidence that institutional demand is remaining resilient despite higher yields.

Bearish Scenario

Pressure could increase if:

• ETF inflows reverse into sustained outflows
• Treasury yields continue rising
• Fed rate expectations become more restrictive
• Bitcoin loses the $80,000 region
• The Treasury reduces the scale of its buybacks after November 4

The key issue is whether ETF demand can remain strong if macro liquidity becomes less supportive.

What Investors Should Watch

The most important indicators are:

• ???? Daily and weekly Bitcoin ETF flows
• ???? BlackRock IBIT and Fidelity FBTC activity
• ???????? U.S. 10-year Treasury yield
• ???? Treasury buyback operations
• ???? Federal Reserve rate expectations
• ₿ Bitcoin's $80K support
• ???? Institutional positioning
• ???? November 4 Treasury refinancing plans

FAQ

How much have Bitcoin ETFs attracted since August 19?

U.S. spot Bitcoin ETFs have recorded approximately $5.3 billion in net inflows since the Treasury announced its expanded long-term debt buyback plans.

How much did Bitcoin ETFs attract last week?

The funds recorded approximately $2.4 billion in net inflows during the week ending September 25.

Is the Treasury buyback program quantitative easing?

No. The Treasury is changing the composition of its debt by buying longer-dated securities and issuing more short-term debt. It does not create bank reserves in the way Federal Reserve quantitative easing does.

Why are Bitcoin ETFs important?

Spot ETFs provide traditional investors with regulated exposure to Bitcoin without requiring direct custody of BTC. Their inflows are therefore an important indicator of institutional and traditional-market demand.

Final Take

Bitcoin ETFs have experienced a major resurgence, with $5.3 billion flowing into U.S. spot products since the August 19 Treasury buyback announcement.

The latest $2.4 billion weekly inflow and the reversal from $5.7 billion of annual outflows in July to roughly $934 million of net inflows now show how quickly institutional demand has changed.

However, rising Treasury yields provide an important counterweight. The next phase of Bitcoin's market will depend on whether strong ETF demand can continue while interest rates, bond yields and U.S. liquidity remain under pressure.