紐約聯準會（New York Fed）前主席 Bill Dudley 警告說，在超過五年未能達到 2% 目標之後，聯準會（Federal Reserve）面臨失去其作為抗通膨鬥士公信力的風險；就在新任聯準會主席 Christopher Waller 仍試圖說服市場，他能夠繼續錨定預期的同時。
摘要
- Dudley 表示，通膨已連續超過五年高於 2%，聯準會對外宣稱自己是有效的抗通膨鬥士，現在正處於「有可能被抹失」的風險之中。
- 他警告說，如果聯準會持續表現得好像貨幣政策是偏緊（restrictive），而在他看來其實「一點都不偏緊」，那麼通膨預期可能會變得「不再被錨定」（unanchored）。
- 相關評論出爐之際，Waller 主席已公開承認，如果通膨與預期沒有盡快回落，重新上調利率（rate hikes）又被擺回了議程表。
根據對 Dudley 近期談話的報導，這位前紐約聯準會總裁表示，「過去五年最驚人的事情」在於通膨一直穩定地高於目標；然而聯準會卻表現得彷彿自己已經做得足夠，且可以安全地談論降息（cuts）。在較早的一篇專欄以及其後的多次訪談中，Dudley 主張，中性利率（neutral interest rate），或 r*，比聯準會所承認的高得多；這意味著實際的政策並不像官員們所願意宣稱的那樣緊，且央行「沒有做夠」來對抗通膨。
Dudley 的核心警告關乎預期，而非著眼於向後看的數據。Dudley 反覆提醒：若聯準會官員允許通膨在一段較長期間維持在超過 2%，家庭與市場將開始假設 3--5% 是新的常態，這會讓未來在不造成嚴重衰退的情況下把通膨拉回來變得更困難。這項擔憂也反映在對聯準會公信力的更廣泛研究之中：一份 RSM 分析指出，紐約聯準會衡量的一年期預期已升至約 3.2%，而五年、五年遠期（five-year, five-year forward）的通膨平衡率（breakeven）約為 2.34%，兩者之間的落差顯示，市場對 2% 目標的短期信心已經出現侵蝕。
Waller 延續的是公信力問題，不只是通膨問題 {#waller-inherits-a-credibility-problem-not-just-an}
Dudley's comments land awkwardly for Christopher Waller, who took over the Fed chair role with a reputation as one of the first officials willing to talk about cuts---only to reverse course as inflation stayed sticky. In a speech in Germany this month, Waller said he can "no longer rule out" voting to raise interest rates again if inflation does not slow, adding that he "would not hesitate" to support a hike if measures of inflation expectations show signs of becoming unanchored.
Those lines read almost like a direct response to Dudley's critique. Dudley and other former officials have warned that cutting too quickly, or leaning on alternative inflation measures to claim victory, would only convince markets the Fed is looking for excuses, undermining its credibility rather than restoring it. One recent commentary noted that using "trimmed mean" or "supercore" metrics to declare the 2% goal achieved "would risk undermining the central bank's credibility," especially after years of missing the headline target.
The deeper issue is that the Fed has managed to irritate both sides of the debate. Critics like Dudley and Kevin Warsh say the central bank is underestimating neutral rates and letting inflation fester, risking a future where expectations slip and a harsher tightening cycle is needed. Others, writing in venues like Forbes, argue the entire idea of the Fed as an "inflation fighter" is a mythology rooted in Phillips Curve thinking, and that the central bank plays at best a peripheral role in actual inflation dynamics.
Why the "inflation fighter" brand matters now {#why-the-inflation-fighter-brand-matters-now}
央行的生死取決於預期，而這也正是 Dudley 試圖一擊到位之處。若市場、企業與家庭停止相信聯準會會在一段時間內採取一切必要手段來維持 2%，那麼工資設定（wage‑setting）與價格設定（price‑setting）的行為就會開始默認地把更高通膨「烘焙」進來，使該目標變成自我否定。
這正是 Waller 以自己的方式所一直在標示的風險。他強調，將較長期的預期維持錨定是「關鍵」，才能達成 2% 目標；並警告說，如果那些預期出現變動，聯準會就必須強力回應——即使要以犧牲短期成長為代價——來挽救其公信力。
Dudley 警告背後令人不安的真相在於，聯準會已不再只是對抗通膨；它還在對抗「在過去五年某個時點失去對敘事的掌控」這種懷疑。無論 Waller 能否恢復這份信任，或是證實那些疑慮，將取決於他談論 2% 的說法多寡，更多取決於他是否願意用真正會付出代價的政策選擇來支持該目標。
