尽管路径震荡，英国中性利率终将走低

关键论点

• 英国中性利率在疫情后的上升主要由通胀冲击推动，包括能源、供应中断、工资、税制变化和脱欧摩擦，而非结构性增长的持久改善。
• 结构性力量（生产率疲弱、人口老龄化、投资需求低迷）指向实际中性利率下行；人工智能虽提供上行可能，但证据过于薄弱，未纳入基准情景。
• 英国国债大量发行、公共债务高企与央行缩表使更多久期由私人投资者承担，令实际收益率和期限溢价维持高位，但未必改变中性利率本身。
• 养老金计划不再显著增加长端敞口，新增需求有限，因此5至7年期品种的风险回报优于超长端。

对应原文证据

1. Restrictive policy and a potentially lower long-term neutral rate point to eventual easing, but inflation risk, heavy issuance and fragile fiscal confidence continue to raise the compensation investors demand for holding long-dated gilts. · long-term
2. The Bank of England may stay cautious while inflation risks linger, but caution is not the same as confirmation of a higher neutral rate.
3. The neutral rate, therefore, provides a useful anchor: it separates volatility in the path of rates from the likely policy destination, even if inflation scares, quantitative tightening (QT), fiscal risk and term premia remain persistent.