Bitcoin ETFs Flip to Outflows While Ether Funds Extend a Fourth Straight Week

The institutional bid inside crypto is splitting. US spot Bitcoin ETFs posted $462.73 million in net outflows across September 8-11, ending a three-week inflow streak that had looked like a resumption of the positive ETF bid from earlier in the month, while ether funds added $197.11 million over the same window for a fourth consecutive positive week. That divergence, playing out as the market reprices a hawkish Federal Reserve and a failed Senate vote, reads less like allocators leaving the complex and more like a rotation inside crypto, according to SoSoValue and Farside data compiled by Incrypted.

The outflows were concentrated. Bitcoin funds bled $282.7 million on September 10 alone, the steepest single-day redemption since July, which accounts for most of the weekly total. Ether went the other way. Led by BlackRock's ETHA, ether products gathered $197.11 million, extending a streak that now covers four consecutive weeks. Altcoin funds were mixed, with XRP ETFs adding $18.98 million while HYPE ETFs saw $26.42 million in outflows.

The timing matters. The weekly ETF data predates the September 16 policy shock, when the Federal Reserve delivered its first rate hike since 2023, moving the federal funds target up 25 basis points to 3.75%-4.00% to counter sticky August inflation. Hours later, the US Senate fell short of the 60 votes needed to advance the Clarity Act, the industry's most-watched regulatory catalyst. Bitcoin fell as much as 5.3% to a $74,910 intraday low and ether dropped over 8% at its worst point, per CNBC TV18 and Bloomberg reporting.

Why the divergence before the shock landed matters for what comes next. A rebalancing read, not a flight, suggests investors are trimming bitcoin exposure after its run and stepping into an under-owned ether after its sharp monthly run, a structural rotation Grayscale frames as a debasement trade now that bitcoin's 90-day correlation with the Nasdaq 100 has fallen to roughly 33% while its link to gold sits above 50%. On chain, caution still shows: stablecoin supply contracted to $309.5 billion from $310.5 billion a week earlier. The question, covered in our bitcoin coverage, is whether ether's institutional bid holds through a repriced rate path, or whether last week's split was the first leg of a broader flush.

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