The Federal Reserve raised its benchmark rate 12 to 0 to 3.75%-4.00% on September 16, 2026, its first hike since July 2023. Bitcoin (BTC) held near $75,600 and Ether (ETH) near $2,376, even as spot Bitcoin ETFs recorded a $295.9 million outflow that day, complicating Wintermute Research's view that the rally reflects capital rotating out of equities.
What happened
| Date | Event | ETF flow |
|---|---|---|
| Sept 15, 2026 | Senate rejects CLARITY Act cloture, 49-50 | -$450.4M |
| Sept 16, 2026 | Fed hikes to 3.75%-4.00%, vote 12-0 | -$295.9M |
| Sept 17, 2026 | Markets digest Fed's projections | BTC holds $75K-$76K |
The Senate rejected cloture on the CLARITY Act 49 to 50 on September 15, 2026, eleven votes short of the 60 needed (CryptoSocial). Spot Bitcoin ETFs posted a $450.4 million net outflow that day, led by Fidelity's FBTC (-$214.8 million) and BlackRock's IBIT (-$161.7 million) (Farside Investors).
On September 16, 2026, the FOMC voted 12-0 to raise the federal funds rate to 3.75%-4.00%, its first increase since July 2023 (Federal Reserve). Bitcoin traded between $75,000 and $76,500, settling near $75,600; Ether ranged from $2,370 to $2,430, closing near $2,376 (The Block). Spot Bitcoin ETFs still posted a $295.9 million net outflow that day, led by BlackRock's IBIT (-$144.1 million) and Ark's ARKB (-$84.4 million) (Farside Investors).
By September 17, 2026, Bitcoin was holding the $75,000 to $76,000 area as markets digested the Fed's projections (UseTheBitcoin).
The Fed's own Summary of Economic Projections shows 12 of 18 participants placing the appropriate year end 2026 rate at 4.125% and four more at 4.375%, meaning 16 of 18 officials expect at least one more quarter point hike this year; only 2 see no further move, at 3.875% (Federal Reserve). Fed Chair Kevin Warsh told reporters he would be "hard-pressed to describe broad financial conditions as restrictive," framing the move as removing some policy accommodation rather than reaching a genuinely tight stance (The Block).
Where analysts disagree
Wintermute Research frames the price action around the hike as capital leaving crowded trades elsewhere rather than a fresh risk-on wave, writing that "capital leaving exhausted equities and a consolidating gold trade is finding its way into crypto," and naming $72,000 as the level that would force a rethink of that view (Benzinga).
That note also cited roughly $987 million in spot Bitcoin ETF inflows for the week ending September 4, 2026, and nearly $3.8 billion over the three weeks before that. Those figures are real, but they predate the Fed decision by nearly two weeks (HedgeCo Insights). Farside's day by day data for the actual hike week point the other way: a $450.4 million outflow on September 15, 2026 and a $295.9 million outflow on September 16, 2026 itself, the day the Fed moved (Farside Investors). A rotation thesis resting on fund flows is harder to defend when the flows for the days in question are net negative.
Bitget's Lewis Huang takes a middle position, saying bitcoin can "absorb more of the immediate shock than equities," since BTC moved roughly four times as much as the S&P 500 on the two preceding FOMC trading days. He separately flagged the risk that the Fed keeps tightening after the energy driven part of inflation fades, which would test the dot plot's 16-of-18 hike lean against cooling headline data (The Block).
The rotation dispute echoes an earlier one. Glassnode has argued that bitcoin's decoupling from equities during macro stress has historically proven short lived, reflecting local exhaustion rather than a structural regime shift. Bitwise's Andre Dragosch takes the opposite view, describing bitcoin as trading like "an amplified version of gold" as investors price in currency debasement risk, a structural rather than temporary shift. Bloomberg's Eric Balchunas has put bitcoin's correlation to US stocks near 0.40 over the six months to early September 2026, lower than gold, small caps, emerging markets or Treasurys (The Block).
Why it matters
The disagreement over rotation is not just rhetorical. It decides how much weight traders put on ETF flow data versus the price level when the two point in different directions.
Why Did Bitcoin Hold Steady After the Fed's Rate Hike on September 16, 2026?
The hike itself was not the surprise: a Reuters poll published before the meeting had 86 of 101 economists, 85%, expecting exactly this quarter point move (Yahoo Finance). What the dot plot made explicit is that 16 of 18 officials see the tightening cycle continuing into year end. A higher for longer path raises the opportunity cost of holding a non yielding asset like bitcoin against short term Treasurys, and typically supports the dollar, both headwinds for crypto in a standard macro framework. That bitcoin has not broken down under that framework is what the rotation and decoupling arguments are trying to explain, and it is why the ETF flow data matters more than the price level alone: price can hold on thin volume while the marginal buyer of the ETF wrapper is still net selling.
What to watch
Wintermute's own line in the sand is $72,000; a close below that level is what the desk says would undercut its reallocation thesis (Benzinga). The next spot Bitcoin ETF flow prints from Farside will show whether September 16's outflow was a one day wobble around the FOMC event or the start of a longer redemption run. The Fed's next scheduled meeting and any incoming CPI print will test whether the 16-of-18 hike lean in the dot plot holds up, since Bitget's Huang has already flagged the risk that policy stays restrictive after the energy driven part of inflation fades.
Bottom line
- The FOMC raised the federal funds rate 12-0 to 3.75%-4.00% on September 16, 2026, its first hike since July 2023 (Federal Reserve).
- Bitcoin held near $75,600 and Ether near $2,376 on decision day, little changed from pre-announcement levels (The Block).
- Spot Bitcoin ETFs posted net outflows of $450.4 million on September 15, 2026 and $295.9 million on September 16, 2026, the opposite direction from the inflow figures Wintermute Research cited, which were dated to the week ending September 4, 2026 (Farside Investors; HedgeCo Insights).
- The Fed's projections show 16 of 18 officials expecting at least one more quarter point hike in 2026, with $72,000 marked by Wintermute as the level that would change its bullish read (Federal Reserve).
Research and analysis only. Nothing here is financial advice or a recommendation to trade. Markets carry risk; decisions are your own.