什么是NAIRU,它如何塑造美联储政策

美国联邦储备委员会 (Federal Reserve) 拥有两个法定目标:最大就业和稳定的价格.一看,它们是相反的方向:推低失业率,通货膨胀往往会上升;推高太低的通货通胀率,就业就会被摧毁.调和这些目标需要一个工作估计,即劳动力市场可以在哪里坐下来,而不会产生加速的价格压力.该估计有名字:NAIRU 无加快的失业通货率.

美国央行没有明确宣布NAIRU作为政策目标.它并没有出现在点图上.但它作为一个不可见的,几乎在每一次FOMC讨论劳动力市场"过于紧张",当它"足够限制",以及双重任务真正平衡时,它都起作用.对于任何观察美元的外汇分析师来说,理解NAIR U和美联储关于其位置的不确定性是解释利率决定,就业数据和央行前指导的重要背景.

纳伊鲁是什么,不是什么

纳伊鲁 (NAIRU) 略为不加快的失业通胀率 (Non-Accelerating Inflation Rate of Unemployment) 是失业率,其通胀不上升也不下降,其余的情况均等.这是总体劳动需求和供应平衡的平衡点,而不会产生过度的工资压力,从而透到价格中.

A common misconception is that NAIRU represents "full employment" or "zero unemployment". It does not. Economies always contain frictional unemployment (workers between jobs), structural unemployment (workers whose skills no longer match available openings), and seasonal variation. NAIRU incorporates all of these. In practice, for the United States economy, NAIRU estimates since the 1990s have ranged between roughly 4% and 6%, depending on which organisation is doing the estimating and which methodology they use.

第二个误解是NAIRU是一个固定常数.它不是.NAIR U是一个动态的,不可观察的变量,由计量经济模型估计,使用失业率和通胀之间的过去关系.当劳动力市场结构特征变化时,NAIR u 变化:人口组成,部门转变,工会权力,地理流动性,技术替代和移民政策都会影响平衡的位置.

菲利普斯曲线:NAIRU的理论基础

纳伊鲁基于菲利普斯曲线,这是经济学家A.W.菲利ፕ斯于1958年第一次从英国工资和失业数据中描述的失业率与通胀率之间的经验关系.基本见解是,低失业与高工资增长和最终高通胀相关,而高失业同低工资增加和低通胀有关.

In its original form, the Phillips curve suggested a stable, exploitable trade-off: policymakers could choose a point on the curve, accepting some level of inflation in exchange for lower unemployment. That view was demolished in the 1970s, when Milton Friedman and Edmund Phelps independently argued that any trade-off was temporary. Workers would eventually anticipate inflation and demand higher wages to compensate, shifting the curve upward. Only at the "natural rate" of unemployment — what we now call NAIRU — would inflation be self-consistent. Below NAIRU, inflation would accelerate; above it, inflation would decelerate.

1970年代的停滞通货膨胀同时高失业率和高通货率似乎证实了这一批评,并破坏了原来的菲利普斯曲线框架.但改编的版本,包含通货紧张预期,幸存下来,并仍然是全球各国央行,包括美联储的现代货币政策模式的支柱.

美联储如何在实践中使用NAIRU

联邦公开市场委员会没有发布一个NAIRU估计,但它在经济预测总结 (SEP) 中发布了一个"长期失业率"预测.

截至2026年初,长期失业率的中位数FOMC预测处于4.1%4.2%左右,这与国会预算办公室 (将长期自然利率定位在4.4%左右) 和美联储自己的员工模型一致.劳巴克-威廉姆斯模型纽约联邦储备银行正式的自然利息估计框架目前将长时间利率设置在3.8%4.5%范围内,反映了真正的模型不确定性.

实际上,美联储以两种方式使用NAIRU作为基准.首先,它通知了双重任务的"最大就业"方面:当失业率明显高于NAIRO时,美聯储有空间放松而不引发通货膨胀.其次,它告知了通货通胀风险评估:当无业率显著低于NAirO时.劳动力市场"过热"和通货紧张风险升高,提供了收紧的理由,即使目前的通货胀数据还不是令人担忧.

美元失业率与NAIRU 三十年的周期

实际失业率与NAIRU之间的差距 (有时称为失业差距) 是美联储内部最常被关注的指标之一.当失业水平低于NAIRO (负失业区间),就业市场被认为紧张,通货膨胀压力正在增加.当无业率高于NAirO (正差距),就存在松,通胀压力的统治.

随着时间的推移,跟踪这一差距揭示了美联储的主要政策周期以及它们与劳动力市场状况的联系.您可以直接从FXMacroData API中获取实际美元失业率数据:

import requests

BASE = "https://fxmacrodata.com/api/v1"
KEY  = "YOUR_API_KEY"

# USD unemployment rate
unemployment = requests.get(
    f"{BASE}/announcements/usd/unemployment",
    params={"api_key": KEY, "start": "2000-01-01"}
).json()["data"]

# USD NAIRU estimate
nairu = requests.get(
    f"{BASE}/announcements/usd/nairu",
    params={"api_key": KEY, "start": "2000-01-01"}
).json()["data"]

print(f"Latest unemployment : {unemployment[0]['val']}% ({unemployment[0]['date']})")
print(f"Latest NAIRU estimate: {nairu[0]['val']}% ({nairu[0]['date']})")

两种情况是:一是1990年代末的繁荣,失业率下降到2000年的4.0%,因为互联网扩张使劳动力市场拉伸到当时被认为是非常紧张的水平,促使美联储激烈提高利率.二是2008年2015年复苏,失职率在金融危机之后升至10%,创造了一个大积极的失业差距,证明了近零的利率七年.三是2022年2023年紧缩的失职比例短暂触及3.4% (1969年以来最低),而NAIRU估计保持在低4s,创造了一个负失业区间,美联儲明确引用了为四十年来最激进的利息上的理由.

美联储的双重任务和NAIRU平衡法案

联邦储备法案授权美联储促进"最大就业,稳定价格和适度的长期利率".实际上,运营的双重任务是最大的就业和价格稳定,2012年灵活的平均通胀目标框架 (FAIT) 定义了价格穩定性为2%的PCE通胀率,平均时间.

NAIRU sits at the nexus of this mandate. When unemployment is above NAIRU and inflation is below 2%, both objectives point in the same direction — ease policy. When unemployment is below NAIRU and inflation is above 2%, both objectives again align — tighten. The genuinely difficult periods are when the objectives conflict: above-NAIRU unemployment but elevated inflation (the stagflation problem the 1970s Fed famously mishandled), or below-NAIRU unemployment but still-falling inflation (the "Goldilocks" conditions of the late 1990s that briefly allowed the Fed to tolerate tight labour markets without tightening aggressively).

The 2021–2024 Cycle: NAIRU in Real Time

疫情后的收紧周期是NAIRU基于推理塑造美联储政策的最新和最有记录的例子.该序列值得审查,因为它说明了NAIR U作为政策指南的力量和局限性.

Through 2021, the Fed maintained that the labour market was far from maximum employment — unemployment still above 5%, payrolls still some 5 million below their pre-pandemic trend, and labour force participation well below 2019 levels. NAIRU estimates, then running around 4.0–4.4%, were well above the actual unemployment reading, suggesting significant remaining slack. This analysis justified the extended asset purchase programme and near-zero rates even as inflation accelerated.

By late 2021 and into 2022, the picture changed dramatically. Non-farm payrolls recovered faster than expected, unemployment fell through 4%, and the unemployment gap turned negative. Simultaneously, inflation surged to 40-year highs. The Fed's belated response — hiking 525 basis points between March 2022 and July 2023 — was driven heavily by recognition that unemployment well below NAIRU, combined with supply-shock inflation, required aggressive tightening to avoid de-anchoring inflation expectations.

The subsequent disinflation debate from 2023 onwards centred on whether the Fed had done enough: with unemployment hovering around 3.7–4.1% (still below or near NAIRU) and inflation declining but not yet at 2%, each FOMC meeting became a live debate about whether the unemployment gap was still negative enough to keep policy restrictive.

美国国家货币汇率 (NAIRU) 不确定性和美元波动性

The single most important implication of NAIRU for FX traders is that the Fed itself does not know exactly where it is. The range of NAIRU estimates across different Fed models, the CBO estimate, and private sector forecasts spans roughly 3.5% to 5.0% — a 150-basis-point band. When actual unemployment is near the middle of that range (say 4.0–4.5%), the Fed is genuinely uncertain whether labour markets are tight enough to warrant continued restraint or loose enough to allow easing.

美国美元的不确定性是美元波动的直接来源.每份工资公告,每份JOLTS报告,每周的失业申请都包含信息,帮助市场缩小NAIRU的可信结果范围.在失业率接近估计NAIR U的制度中,就业市场数据比失业水平明显高于或低于平衡水平时更有市场动作,因为平衡本身受到质疑.

美国联邦储备委员会 (Fed) 认为,美国的经济增长率将在未来几年内大幅增长,但在未来,美国将会出现更大的增长.

如何监测与NAIRU相关的信号

对于外汇分析师和交易者来说,NAIRU本身并非直接交易的,但显示劳动力市场与NAIRO相比的信号是:

农业以外的工资和失业率 劳动力市场的头条新闻. 工资单打印,使失业率低于预计的NAIRU,对美元来说是明确的派;

平均小时工资 工资单的工资成分是劳动力市场紧张的最直接信号之一.当NAIRU接近4%时,工资年增长率持续高于4%,这表明失业差距是负值的,工价螺旋风险较高.

工作机会 空缺与失业人数比率提供了对劳动力市场紧张局势的补充观点,比总体失业率更难控制,自2021年以来,FOMC成员一直在大量引用这一观点.

核心PCE调值器 美联储首选的通胀指标.当核心PCE超过2%且失业率接近NAIRU时,双重任务不平衡,美联网将倾向于.

import requests

BASE = "https://fxmacrodata.com/api/v1"
KEY  = "YOUR_API_KEY"

# Key NAIRU-related indicators for USD
for indicator, label in [
    ("unemployment",          "Unemployment rate"),
    ("nairu",                 "NAIRU estimate"),
    ("non_farm_payrolls",     "Non-farm payrolls"),
    ("average_hourly_earnings", "Average hourly earnings"),
    ("core_inflation",        "Core PCE inflation"),
]:
    r = requests.get(
        f"{BASE}/announcements/usd/{indicator}",
        params={"api_key": KEY}
    ).json()
    latest = r["data"][0] if r.get("data") else {}
    print(f"{label:30s}: {latest.get('val', 'N/A')} ({latest.get('date', 'N/A')})")

纳伊鲁的结构性变化:为什么估计继续变化

For FX analysts with a longer time horizon, the structural drift in NAIRU estimates is as important as the current unemployment gap. NAIRU fell sharply in the United States during the 1990s — from estimates near 6% in the mid-1980s to below 5% by 2000 — as technology investment drove productivity gains and globalisation suppressed import prices and wage demands. The Fed's then-Chair Alan Greenspan famously bet that the new economy had shifted the supply curve, allowing the central bank to permit unemployment to fall well below prior NAIRU estimates without triggering inflation. He was largely proved right, in one of the more consequential NAIRU reassessments in Fed history.

2008年后的时期带来了不同的结构故事.长期的失业率超过8%到2011年2012年引发了人们的担忧,即长期失业和技能衰退正在提高NAIRU (歇斯底效应) 这意味着即使实际失业水平提高,NAIR U也可能会上升,这对扩张政策的空间比简单的差距模型所建议的少.美联储的近零利率政策延长到2015年反映了NAIR u没有上升的投注,而且热运行就业市场会治愈歇斯度损害,而不是加速通货膨胀.

疫情后,结构性NAIRU转变再次成为政策辩论的中心.数百万老年工人的提前退休使劳动力供应永久减少,可能会提高NAIR U. 但随后的青春期工人的重新参与率推动了参与率达到多十年的最高水平,可能使其降低.移民流量足够大,以影响劳动力的供应估计. 2026年NAIR u的净影响仍然是真正不确定的,这正是为什么美联储仍然处于数据依赖模式,而不是依靠固定估计

外国汇交易者要注意的关键事项

美国联邦储备委员会 (Fed) 的政策是以NAIRU为基础的.虽然它不出现在任何单独的公布表上,但它影响了FOMC如何解释每一份就业报告,每一份JOLTS发布,以及每一份工资增长报纸.对于美元交易者来说,以下是 NAIRU相关的核心原则:

关注失业率差距,而不是水平. 失业率为4.2%,如果NAIRU为3.8%,则是猎,如果NAirU为4.6%,那么是子.仅仅是利率水平告诉你它相对于美联储平衡估计的位置不多.

联邦政府对NAIRU的不确定性加剧了数据的敏感性. 当失业率接近NAIRU预计区间时,每次劳动力市场释放都比失业水平远离平衡时更具有市场动态潜力.

核心PCE确认或矛盾NAIRU信号. 劳动力市场紧张 (NAIRU以下),而不会产生高于目标通胀率,这表明NAIRO可能低于预期,使美联储能够在没有通胀后果的情况下放宽.注意两种信号的分歧.

NAIRU的修订可能会引发制度变化. 当美联储模型修改NAIRU估计值时,就像1990年代和2010年代中期发生的那样,政策反应功能会发生变化,美元的价格也会相应地重新定价.美联儲研究人员和学术经济学家提出挑战现行NAIR U估计的声明是最终政策转向的主要指标.

您可以通过"美国美元劳动力市场和通胀指标"失业率,NAIRU,非农业工资单,平均小时工资和核心PCE查看 汇率指数目录,提供历史时间序列,并提供公告级时间,用于对NAIRU相关交易策略进行后期测试.