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Bitcoin exchange-traded products (ETPs) recorded their largest weekly inflows since July, signaling renewed institutional demand despite historically low volatility. According to K33 Research, global Bitcoin ETPs saw a net inflow of 20,685 BTC last week, with U.S. spot ETFs accounting for nearly all of the demand.
U.S. ETFs Drive Majority of Inflows
Of the 20,685 BTC inflows, nearly 97% came from U.S.-listed Bitcoin ETFs, underscoring the country’s growing role in institutional crypto adoption. The surge pushed combined U.S. Bitcoin ETF holdings to 1.32 million BTC, surpassing the previous record set on July 30.
This momentum highlights strong investor appetite ahead of the Federal Reserve’s September rate decision, a key macro event closely watched by both traditional and digital asset markets.
“André Dragosch, head of research for Europe at Bitwise Investments, noted that ETF flows are increasingly becoming one of the strongest determinants of Bitcoin’s performance. According to Dragosch, the share of Bitcoin price movements explained by changes in ETP flows has now reached an all-time high.
Rotation From Ethereum to Bitcoin
Compared to Ethereum, Bitcoin continues to capture the lion’s share of institutional flows. Data from Bitwise suggests that capital has recently rotated back into Bitcoin from Ethereum-based products, reflecting shifting investor priorities.
Over the past week, Bitcoin ETF inflows have exceeded new supply growth by nearly 9 times, giving the asset a substantial tailwind. Analysts at K33 pointed out that since ETF approvals last year, fund flows have been a key driver of Bitcoin’s resilience, and the latest surge reinforces this trend.
Outpacing New Supply
In the last 30 days alone, institutional investors accumulated roughly 22,853 BTC through various ETPs. This figure outpaces the 14,056 BTC in new supply generated by miners during the same period.
Such imbalances between demand and supply are often viewed as bullish indicators for long-term price support, especially when combined with sustained institutional participation.
Fidelity’s FBTC Leads the Pack
One of the biggest contributors to last week’s inflows was Fidelity’s FBTC, which saw $843 million in net demand. This accounted for 36% of total ETF inflows, marking Fidelity’s strongest intake in 18 months.
Bitwise analysts attributed the upswing not only to soft inflation data and rate cut expectations but also to a flurry of crypto-related IPOs and new corporate developments, which helped fuel risk appetite across financial markets.
Low Volatility Tempers Momentum
Despite the surge in ETF demand, both realized and implied volatility for Bitcoin remain historically low. K33 Research noted that Bitcoin’s seven-day volatility dropped to less than 0.7% last week, its lowest level of the year before rebounding slightly above $115,000.
It marked the second-longest streak in 2025 of sub-1.3% seven-day volatility, highlighting how calm the market has been even amid record inflows. Implied volatility, derived from options markets, also remains near multi-year lows, suggesting traders are not anticipating major swings in the near term.
Macro Backdrop in Focus
Looking ahead, all eyes are on the Federal Reserve’s upcoming rate decision, which could prove pivotal for risk assets such as Bitcoin, equities, and gold. With the S&P 500 and Bitcoin both trading near all-time highs, the central bank’s stance on inflation and employment will play a crucial role in shaping investor sentiment.
If the Fed follows through with a widely anticipated rate cut, it could provide a further boost to institutional risk-taking and support sustained ETF inflows into Bitcoin.
The Bigger Picture
Bitcoin’s record ETF inflows highlight the asset’s growing role as a mainstream investment vehicle for both retail and institutional investors. While volatility remains subdued, the consistent absorption of new supply by ETFs points to an underlying structural demand.
Analysts suggest that as Bitcoin ETFs continue to attract capital, the cryptocurrency’s ability to maintain higher price levels will strengthen. However, the lack of volatility also indicates that while institutional adoption is growing, the market may remain range-bound in the short term until macroeconomic shifts or regulatory catalysts spark new momentum.
