In the wake of the Fed's latest decision to hold rates steady, with Warsh stating at his press conference that he would not pre-judge the December decision, veteran journalist Nick Timiraos, long known as the "Fed whisperer," published a fresh piece focusing on the key signals Warsh sent at his latest press briefing, with the core issue zeroing in on a question that has made markets highly sensitive: can high interest rates actually suppress this round of AI investment frenzy?
In his October 29 article, Timiraos noted that for a long time the market widely believed the AI industry was too cash-rich to be bothered by rate changes, but Warsh explicitly shattered that assumption, pointing out that rising borrowing costs are genuinely affecting the pace of expansion in the tech sector.
The article stated that Warsh simultaneously offered two opposing judgments at the press conference — on one hand, he argued that high rates are gradually seeping into the AI investment boom; on the other, he stressed that economic growth is spreading to areas beyond AI. These two judgments appear contradictory, yet together they form the most intractable "two-way dilemma" on the Fed's current monetary policy path.
Warsh Questions the "AI Immunity Theory": Rates Will Seep Into Every Crevice
The article noted that a popular narrative has long circulated in the market: the AI boom is too large and too cash-flush to care about rate levels. This narrative had almost become "consensus" at several previous Fed press conferences. However, Warsh directly punctured this logic at the latest briefing.
Timiraos quoted Warsh's exact words from the press conference:
"There's a narrative that has been around for quite some time, perhaps in this very room, reflected in several past press conferences — that monetary policy tightening 'won't have any impact on AI, because the returns investors expect are on a completely different order of magnitude from interest rates.' I am skeptical of that view. Interest rates seep into every crevice. Interest rates directly or indirectly affect almost everything."
Warsh further pointed out that since the last rate hike, evidence has emerged showing investors are becoming more selective about what they invest in — borrowing costs for some higher-risk companies have jumped noticeably. This shows the transmission mechanism of rates is not absent; it is merely slower to manifest in the AI space.
The "Crack Effect" of Rate Transmission: Gradual Shock from the Periphery to the Core
So how exactly do high rates affect the AI boom? There is a key mechanism worth noting here.
Timiraos wrote that Marc Giannoni, chief U.S. economist at Barclays, offered a clear explanation in an interview: "The idea that anything related to AI is completely insensitive to interest rates — that view seems very extreme to me." He further noted that tech giants may not need to borrow to fund their own spending, but the operators and supporting companies building data centers around them "face debt rates as a significant factor."
Timiraos suggested this is like a large tree — the trunk (tech giants) may temporarily be unaffected by wind and rain, but the branches and roots (supporting companies, debt financiers) are already under pressure. Vincent Reinhart, a former senior Fed adviser and now chief economist at BNY Investments, offered an even more cautionary assessment:
"There is a tipping point, and once reached, it will snap. At that point, the Fed may find that spending contracts far more than its models predict."
The article stated that this "gradual shock" logic is precisely the underlying basis for Warsh's skepticism toward the "AI immunity theory."
The Other Side of Growth Diffusion: Does a Strong Economy Necessarily Push Inflation Higher?
The article noted that Warsh's second judgment points in the opposite direction. He argued that attributing economic strength entirely to the AI technology wave is a "convenient but inaccurate" claim. His exact words: "Saying the economy's strength comes entirely from this new tech wave — that's convenient. But in fact, business investment is not only strong, it is also spreading."
Yet Warsh immediately added that he does not believe strong growth necessarily pushes inflation higher, nor does he believe it necessarily means higher rates are needed. This statement left the market somewhat puzzled — growth is spreading, but that doesn't necessarily mean rate hikes? Reinhart's interpretation: "He's essentially saying, 'We need to do more, but probably not too much more.'"
Timiraos argued that this ambiguity is precisely the hardest part for markets to digest. When a central bank chair simultaneously sends signals of "need to do more" and "don't need to do too much," market expectations become divided on where to anchor — and that division itself creates volatility.
Wall Street's Confusion: Warsh's Remarks "Neither Clear Nor Convincing"
Warsh's comments triggered noticeable unease in the bond market. Timiraos noted in his report that during Warsh's remarks, investors began trimming bets on next year's rate hikes, while long-term Treasury yields edged higher — a signal of growing market concerns about future inflation.
Several Wall Street strategists offered critical assessments of Warsh's remarks. TD Securities strategists said Warsh "did not clearly explain why the Committee prefers to wait until December to hike." Mark Cabana, head of U.S. rates strategy at Bank of America, was more direct, calling Warsh's answers "neither clear nor convincing." Cabana argued that Warsh appeared to be using recent risk-asset volatility and a slight decline in market inflation expectations to justify standing pat, but those moves "weren't that large."
This skepticism from the market reflects a deeper issue: against the backdrop of two years of zero progress on inflation, is the Fed's policy communication clear enough? Bond investors are looking for an unambiguous signal that the Fed is committed to pushing inflation back to its 2% target, and Warsh's remarks clearly did not fully satisfy that demand.
"The Fed Needs Two Rates": The Structural Predicament of Policy Tools
Timiraos noted in the article that behind this debate lies a more fundamental policy predicament. Jonathan Pingle, chief U.S. economist at UBS, captured the essence of the problem in one sentence:
"It's almost as if the Fed needs two rates — one for the AI boom and the stock-market wealth effect it drives, and another for everything else."
This metaphor is vivid. If the AI boom is insensitive to interest rates, then the Fed's continued rate hikes to cool AI would cause excessive damage to housing, commercial real estate, small businesses, and lower- and middle-income consumers — sectors that were not the main source of this inflation round to begin with. It's like using a sledgehammer to drive a nail; the surrounding wall may collapse first.
William English, a former Fed economist now at Yale School of Management, explained from another angle why AI companies are insensitive to rates: "You want to be one of the winners, which means you have to get there first." Under winner-take-all competitive logic, companies' sensitivity to funding costs is suppressed by the fear of "falling behind." This psychological mechanism significantly blunts the effectiveness of conventional monetary policy tools.
The Path Ahead: Inflation Resilience and Uncertainty Over the Rate-Hike Endpoint
Looking ahead, Timiraos gathered forecasts from multiple economists on the Fed's policy path, with an overall tone leaning cautious.
Reinhart believes the balance of risk tilts toward the Fed needing to do more in the near term than expected. His reasoning: energy and commodity prices appear to be stabilizing at a higher level, which will force other prices to follow upward. "They may find inflation more resilient than expected, at which point they will lose patience in 2027 and have to tighten further." This judgment implies that even if the current pace of rate hikes slows, the tightening story may be far from over.
Viewed as a complete logical chain, Warsh's two-way judgments actually form a full framework of a "dilemma":
If AI is sensitive to rates, then rate hikes are more efficient with less collateral damage, but also mean greater downside risk for the economy; if AI is insensitive to rates, then the Fed must achieve its cooling goal by hurting other, more fragile sectors of the economy, making the policy cost much higher. Whichever scenario materializes, the Fed's room for maneuver is narrower than it appears on the surface.
In summary, the most important thing Timiraos reveals in this piece is a long-overlooked crack in the current Fed policy debate — the market narrative of "AI immunity" is now facing open skepticism from within the Fed itself.
The two contradictory signals Warsh sent at the same press conference reflect the real predicament the Fed currently faces — worried both that the AI boom is immune to high rates and will keep inflation from being tamed, and that high rates will suddenly "snap" at some tipping point, causing greater-than-expected economic damage. These two concerns point toward completely opposite policy directions.
As Timiraos presents in his article, this is not an equation with a standard answer. How sensitive the AI boom actually is to interest rates — no one can give a definitive answer right now, and that answer will largely determine where the endpoint of the Fed's rate-hike path lies.
For markets, Warsh's vague remarks may themselves be a signal: the Fed itself hasn't figured it out yet. Under this uncertainty, both the bond market and tech stocks need to brace for more volatility.
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