美联储可能会在 9 月份加息。这就是它对每一篇加密论文的作用。

CME FedWatch odds for a September rate hike have surged past 66% after Fed Chair Kevin Warsh’s hawkish Jackson Hole speech and oil prices driven above $90 by the Iran conflict. Bitcoin is holding $78,000 after a 25% August rally, but the structural question remains unanswered: does ETF demand change what a rate hike does to crypto, or does it just delay the pain?

Summary CME FedWatch pricing shows a 66% probability of a 25 basis point rate hike at the September 15-16 FOMC meeting, up from 35% before Fed Chair Kevin Warsh’s Jackson Hole address.

Barclays now forecasts two rate hikes in 2026, in September and December, reversing its earlier hold call and raising the terminal rate outlook.

Bitcoin gained 25% in August, its best month since November 2024, while spot Bitcoin ETFs pulled in $3.52 billion in net inflows across 16 of 21 trading days.

The federal funds rate sits at 3.50% to 3.75% after three cuts in 2025; a September hike would be the first increase since July 2023, ending the longest pause since before the pandemic tightening.

Brent crude surged above $91 per barrel after renewed U.S.-Iran strikes near the Strait of Hormuz, with the PCE inflation index running at 3.7% over 12 months and 4.1% over six, well above the 2% target.

Bitcoin just had its best August since 2017. It gained 25%, spot ETFs attracted $3.52 billion, and the price reclaimed $78,000 from a May low near $63,000. By any normal measure, the trend is up.

The problem is that normal stopped applying when the Fed’s new chair told Jackson Hole that inflation was “concerning” and the market immediately repriced September from a hold to a probable hike. Oil is above $90 because Iran is not a hypothetical risk anymore. Inflation is running at nearly double the target. And the instrument the Fed uses to fight inflation, higher interest rates, has historically been the single most reliable killer of crypto rallies.

The last time the Fed hiked aggressively, Bitcoin fell 77%. This time is supposed to be different because ETFs exist. Whether that is true depends on what exactly is buying bitcoin and whether it will keep buying when yields rise.

What the Fed is looking at

The numbers that will sit in front of the FOMC on September 15 are not ambiguous.

The Personal Consumption Expenditures price index, the Fed’s preferred inflation gauge, is running at 3.7% over 12 months and 4.1% over six months. Both are roughly double the 2% target. Core PCE, which strips out food and energy, is more contained but still elevated. The direction is wrong.

Energy is the proximate cause. Brent crude hit $91.25 per barrel on Sept. 1 after renewed fighting between the U.S. and Iran near the Strait of Hormuz revived fears about shipping through the world’s most important oil chokepoint. WTI reached $86.36. Gasoline prices have followed. Inflation hit 4.2% in May, a three-year high driven by a 23.5% surge in energy costs.

The July jobs report briefly pushed hike odds down to about 30% after a significant miss in non-farm payrolls. But Warsh’s Jackson Hole speech on Aug. 28 overrode that signal. He called the inflation picture “concerning,” cited the PCE readings explicitly, and made clear that the Fed was prepared to act. Markets repriced within hours.

Fed Governor Michael Barr then reinforced the message, saying he backed a “decisive” increase if inflation failed to ease. Polymarket traders pushed hike probability to 72% after his statement. The CME’s FedWatch tool, which reflects actual fed funds futures positioning, settled at 66%.

The market is not guessing. It is pricing the hike as a base case.

BNP Paribas went further, revising its forecast to project three rate hikes starting in December 2026 that would effectively reverse the three cuts delivered during 2025. If that path materializes, the federal funds rate would return to 4.25% to 4.50% by mid-2027, the same level that produced the deepest bitcoin drawdown in the asset’s history.

Even one hike changes the narrative. The market spent most of 2025 and early 2026 expecting rate cuts. The shift from “when does the Fed cut” to “how many times does the Fed hike” is a regime change in expectations, and regime changes produce larger price moves than individual rate decisions.

The transmission: rates up, risk assets down

The mechanics of how a rate hike reaches crypto are straightforward, even if the market sometimes pretends otherwise.

When the Fed raises the federal funds rate, the risk-free return on Treasury bills and money market funds increases. Every asset in the economy is priced relative to that benchmark. A higher risk-free rate means that risky assets need to offer a higher expected return to justify their volatility, or their prices fall until the implied return rises to meet the new bar.

JUST IN: Four of the Fed’s 12 regional banks pushed to raise the discount rate in July

The proposals were rejected as policymakers voted 9-3 to keep the main policy rate unchanged, highlighting a growing split over inflation pic.twitter.com/ihpDh4KJ0s — crypto.news (@cryptodotnews) August 26, 2026

In 2022, the Fed raised rates from 0.25% to 4.50%, the fastest tightening cycle in four decades. Bitcoin fell 77%, from roughly $48,000 in March to $15,500 by November. The S&P 500 fell 25%. The Nasdaq fell 33%. Bitcoin was not a hedge against inflation. It was not a hedge against anything. It was the most rate-sensitive large-cap asset in the market.

The correlation between Bitcoin and the Nasdaq reached historic highs during that cycle, demolishing the “uncorrelated asset” thesis that had been a pillar of institutional bitcoin allocation models. Bitcoin tracked risk appetite, and rate hikes destroyed risk appetite.

A single 25 basis point hike from 3.50% to 3.75% is not the same as 425 basis points in nine months. The magnitude matters. But the direction is what markets price first, and the direction here is unmistakable: the cost of capital is going up, not down. Every asset on the planet gets repriced when that direction reverses, and bitcoin’s history shows it reprices harder than most.

Why this time is supposed to be different

The bull case for bitcoin surviving a rate hike rests on one structural change: spot ETFs.

U.S. spot Bitcoin ETFs launched in January 2024 and have since accumulated over $99 billion in net assets. In August 2026 alone, they pulled in $3.52 billion, their strongest month of the year. The funds recorded net inflows on 16 of 21 trading days, including nine consecutive positive sessions from Aug. 17 through 27. The number of large-scale asset managers holding Bitcoin ETF positions has increased by 150% over the past year.

The argument is that ETF flows represent a new kind of buyer: institutional allocators running model portfolios where bitcoin has a 1% to 5% weighting. These buyers do not trade on macro fear. They rebalance on a schedule. When bitcoin falls, their allocation drops below target and they buy automatically. When bitcoin rises, they trim. The buying is mechanical, and it creates a structural bid that did not exist during the 2022 wipeout.

August’s data supports this reading. Bitcoin rallied 25% while oil surged, Iran tensions escalated, and hike odds doubled. The old playbook said bitcoin should have sold off. Instead, ETF inflows accelerated. Institutional demand appeared to absorb the selling pressure that geopolitics and macro fear would normally create. The counterargument is simpler: the hike has not happened yet.

The case that ETF demand breaks under a hike

ETF inflows are not unconditional. They respond to the same forces as every other investment flow, just with a lag.

In the first half of 2026, bitcoin ETFs experienced cumulative net outflows of $5.29 billion as the price fell from $94,000 in January to $63,000 in May. The institutional bid did not prevent the drawdown. It participated in it. Citadel Securities warned that the Fed could resume hikes as early as September, adding direct pressure on risk assets including bitcoin.

If the Fed hikes on September 16, the immediate effect is a stronger dollar, higher Treasury yields, and a repricing of risk premiums across every asset class. Model portfolios that include bitcoin as a risk asset would see their expected return threshold rise. Some allocators would reduce exposure. Others would pause new inflows until the rate trajectory becomes clearer.

The August rally makes the math worse, not better. Bitcoin at $78,000 after a 25% run offers less upside than bitcoin at $63,000. A rate hike at the top of a momentum-driven rally is the setup that produces the sharpest corrections, because leveraged longs and momentum traders exit simultaneously.

The $3.52 billion in August ETF inflows is impressive. It is also less than 4% of the $99 billion in total net assets. A reversal of sentiment could produce outflows that exceed a single month’s inflows, as happened in February and March 2026 when $2.1 billion left in consecutive weeks.

The composition of ETF buyers matters too. A significant portion of ETF inflows comes from hedge funds running basis trades: buying spot bitcoin through the ETF while shorting CME futures to capture the premium. These positions are rate-sensitive. When Treasury yields rise, the opportunity cost of tying up capital in a basis trade increases. The premium narrows. The trade becomes less attractive, and the positions unwind. This is not panic selling. It is rational reallocation, and it shows up in ETF outflow data without any change in directional conviction about bitcoin’s price.

The 150% increase in large-scale asset managers holding bitcoin ETF positions sounds like unstoppable institutional adoption. But position size matters more than position count. A pension fund with 0.5% allocated to bitcoin will not increase that allocation because bitcoin had a good August. It will rebalance mechanically, and if bitcoin rises enough, it will sell to stay at target weight. The same structural force that creates the floor also creates a ceiling.

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