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Bitcoin ETF Inflows Surge but ETH Still Outperforms: What Is Going On?

Reported by Tradingview
Sep 29, 2026· 3 min read
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Key Takeaways
  • • Bitcoin ETF inflows surged $2.77 billion from September 17–27, marking seven consecutive positive U.S. trading sessions and supporting BTC recovery above $85,000, though Bitcoin has gained only 8% over the past month compared to Ethereum's 11% advance.
  • • Ethereum spot trading volume reached 300% that of Bitcoin on September 29, the highest ratio since September 2025, signaling capital rotation into ETH despite more mixed recent ETF inflows for the asset.
  • • On-chain analytics firm Santiment Intelligence warned that rapidly accelerating Bitcoin ETF inflows following a significant price rally may indicate FOMO and raise the risk of an overheated market, cautioning that "euphoric demand is where risk starts rising."
  • • Ethereum is forming a bull flag pattern with $2,640 as key support; an hourly close above $2,700 could confirm a breakout and target $3,000, according to crypto analyst Ali Martinez, while the broader technical structure remains constructive despite near-term bearish-to-neutral signals on shorter timeframes.
  • • Bitfinex characterized Bitcoin sentiment as "warm" with softer prices supported by strong underlying demand, but cautioned that "one strong week is not a trend yet," underscoring the need for sustained inflow momentum before confirming a sustained recovery.
Summary
Bitcoin and Ethereum have diverged meaningfully in recent weeks, with Ethereum outpacing Bitcoin despite robust spot ETF inflows supporting the largest cryptocurrency's recovery. Over the past month through September 29, Bitcoin has advanced approximately 8%, while Ethereum has delivered an 11% gain, reflecting what market participants describe as capital rotation into the second-largest cryptocurrency by market capitalization. This performance disparity has occurred even as Bitcoin ETF demand has accelerated significantly, demonstrating that institutional buying pressure alone has not been sufficient to drive Bitcoin outperformance relative to Ethereum.

Bitcoin spot ETFs recorded $2.77 billion in net inflows from September 17 through September 27, generating seven consecutive positive U.S. trading sessions that helped propel BTC above the $85,000 level. Cryptocurrency exchange Bitfinex characterized sentiment around Bitcoin as "warm," with softer prices continuing to be supported by heavy ETF inflows. However, Bitfinex cautioned institutional investors that the recent strength represents only a single strong week and should not yet be interpreted as the establishment of a sustained uptrend. The sharp acceleration in inflows has prompted warnings from on-chain analytics provider Santiment Intelligence, which noted that rapidly increasing institutional capital following significant price rallies can signal FOMO and heighten the risk of market overheating. Santiment emphasized that "healthy demand is encouraging. Euphoric demand is where risk starts rising," suggesting that current inflow momentum warrants close monitoring for signs of speculative excess.

Ethereum's relative outperformance appears partly driven by shifting capital allocation, evidenced by spot trading volume reaching 300% that of Bitcoin on September 29—the highest ratio recorded since September 2025. While Ethereum ETF flows have been mixed in recent weeks, August 2026 marked the strongest monthly inflows for Ethereum ETFs in more than a year, suggesting institutional appetite for the asset class remains present. Technical analysis supports a constructive case for further ETH appreciation. Crypto analyst Ali Martinez identified a bull flag formation in Ethereum with $2,640 serving as critical support; a sustained hourly close above $2,700 could confirm a breakout and establish $3,000 as the next target. Widely followed trader ZeroHedge acknowledged that Ethereum has entered a bearish-to-neutral phase on the four-hour chart but maintained that the higher-timeframe technical picture remains constructive, supporting the case for continued strength.

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Tradingview Bitcoin ETF Inflows Surge but ETH Still Outperforms: What Is Going On?