$4B in Bitcoin over 4 weeks: Bitcoin ETFs acquire more than twice the amount of BTC produced.

U.S. spot Bitcoin ETFs experienced an influx of $1.63 billion last week, raising the total net intake over the past four weeks to $3.96 billion and marking nine weeks of positive inflows out of the last twelve.

The rolling 12-week total now stands at $6.08 billion, which is approximately mid-range for 2025 according to CryptoSlate’s internal tracker derived from fund disclosures and public flow tables.

Year-to-date, net inflows have reached $22.78 billion, with a cumulative total of $58.44 billion since inception.

The assets-under-management estimate is $155.9 billion, while the average weekly trading volume over the last four weeks is $16.17 billion, compared to a 12-week average of $17.90 billion.

Weekly ETF net flows

Flows have re-accelerated as the quarter transitions and the macroeconomic landscape shifts.

The Federal Reserve reduced interest rates in September, and market expectations are leaning towards further easing in the fourth quarter, which lowers the barrier for rate-sensitive investors utilizing ETFs to increase their exposure.

The onset of the U.S. government shutdown drove gold prices to record highs and weakened the dollar, a cross-asset scenario that has historically been associated with stronger crypto ETP performance. Global product data supports this trend.

CoinShares reported consecutive weekly inflows through late September, with Bitcoin capturing the majority of investments, and $1.03 billion flowed into digital asset funds in the week ending Sept. 29, including $790 million directed towards Bitcoin vehicles. Liquidity continues to be ETF-focused.

Kaiko Research indicates that U.S. trading hours have maintained a larger share of market depth since the ETF launch, and ETF net flows account for only a small portion of daily BTC returns, with an R² value close to 0.32. This highlights that derivatives and macro factors still significantly influence price variance.

As Q4 commences, basic scenario analysis outlines the potential for net flows and the volume of Bitcoin that could be absorbed from the circulating supply.

The annualized rate over the past four weeks suggests approximately $12.9 billion for the quarter, while the 12-week run-rate indicates around $6.6 billion. The outer limits are defined by the extremes projected for 2025.

At a hypothetical Bitcoin price of $115,000, each $1 billion over a four-week period corresponds to roughly 8,700 BTC in net purchases, averaging about 311 BTC per day.

Post-halving issuance is approximately 450 BTC daily, totaling around 41,400 BTC over a 92-day quarter. The table below converts these rates into Q4 totals.

Scenario	Assumption	Q4 net flows (USD)	BTC absorbed at $115k	vs. miner issuance
Bull, retouch 2025 best 12-week pace	+$17.1B per 12 weeks	~+$18.5B	~161,000 BTC	~3.9× quarterly issuance
Base, sustain last 4-week pace	+$3.96B per 4 weeks	~+$12.9B	~112,000 BTC	~2.7×
Moderate, revert to 12-week average	+$6.08B per 12 weeks	~+$6.6B	~57,000 BTC	~1.4×
Bear, revisit 2025 worst 12-week run	−$4.56B per 12 weeks	~−$4.9B	~−43,000 BTC	≈−1.0×

In the Base scenario, U.S. spot Bitcoin ETFs would remove approximately 112,000 BTC from circulation this quarter, equating to about 2.7 times the new issuance. This level of absorption typically tightens spot availability and supports the basis when risk appetite remains stable.

August’s CPI recorded a year-over-year increase of 2.9 percent, reinforcing the narrative of disinflation and easing that supports allocator demand.

Seasonal factors introduce a behavioral aspect, with investors noting October’s historical strength for crypto.

The rolling 12-week total of net flows indicates a decline towards the average after reaching the 2024 peak in mid-July. Consequently, recent weekly inflows exceed the current average trend, suggesting a possible reversal of previous patterns.

However, if historical trends persist, net outflows could approach approximately $500 million per week by December.

12-week rolling ETF net flows

Microstructure continues to adapt around ETF activities.

Kaiko’s analysis reveals increased trading activity concentrated around U.S. creation and redemption periods, with liquidity during these hours playing a more significant role in price discovery than prior to the ETF launch, which helps clarify why prices can remain stable even amid mixed flow data.

The correlation framework, where ETF flows account for only a fraction of daily returns, also implies that macroeconomic releases, funding, and positioning on CME are important for daily price movements. Traders monitoring futures open interest and volume can utilize CME metrics to validate risk appetite alongside fund flows, with Kaiko’s dashboards offering a comprehensive view of market depth and spreads across different venues.

Rotation remains a secondary theme. U.S. spot Ethereum ETFs have attracted consistent allocations since July, and a sell-side update this week positioned ETH as a relative gainer. Reuters reported that Citi raised its year-end ETH target while reducing its BTC forecast based on perceived changes in investor flows.

Currently, the U.S. continues to be the marginal buyer in this cycle, and CoinShares’ late-September report indicated that Bitcoin still leads in weekly allocations across global ETPs.

Short-term risks are concentrated around data and policy timing.

The government shutdown may postpone or distort early-month macroeconomic reports, including nonfarm payrolls and CPI, heightening narrative fluctuations when investors have fewer reference points.

This situation makes the ETF activity an even more prominent indicator of risk sentiment as Q4 begins.

If the recent four-week trend continues, net intake for the quarter could approach $13 billion by year-end.

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