How should central banks respond to US tariffs?

Episode Summary

Executive Summary: Swati Dhingra argues that trade shocks are central to UK monetary policy because the UK is a highly open economy with large imported content in consumption. She explains why she supported faster rate cuts, how weak data complicates policymaking, and why Trump-era tariffs likely create mostly one-off price effects unless they trigger deeper trade fragmentation. She also uses Brexit to show trade barriers can quickly hurt growth, investment, and real wages.

Main Topics: Trade’s importance for UK monetary policy (Priority: 5/5): Dhingra says trade matters much more for the UK and euro area than for the US because a much larger share of the UK consumption basket is exposed to imports, energy, and food prices. Why she favored faster rate cuts (Priority: 5/5): She explains that she gave more weight to falling supply-chain price pressures and weakening demand than to the majority view that inflation would remain sticky after the pandemic and energy shocks. Data limitations in UK policymaking (Priority: 4/5): She describes severe problems with noisy, incomplete, and sometimes unusable data, making evidence-based policy harder and forcing policymakers to rely more on judgment. How US tariffs affect the UK (Priority: 5/5): She argues direct inflation effects from US tariffs are limited, but indirect effects through world prices, exchange rates, and potential trade fragmentation could matter more for the UK. Brexit as a trade-shock case study (Priority: 5/5): Dhingra says Brexit showed that trade barriers can quickly weaken sterling, raise import prices, depress real wage growth, and reduce business investment without delivering promised gains. What trade shocks mean for inflation and policy (Priority: 4/5): She contends that most trade shocks cause one-off price level shifts rather than persistent inflation, so central banks should usually look through them unless they occur amid already-high inflation.

Key Arguments: Trade is about 5/10 in normal UK monetary policymaking but can rise to 8/10 during major terms-of-trade shocks. The UK’s consumption basket is far more exposed to external prices than the US’s, making global trade shocks especially relevant. Much of the post-pandemic inflation surge was driven by external factors such as imports and energy, not purely domestic demand. She supported larger rate cuts because producer price inflation was falling and wage data looked noisy and less persuasive than headline CPI growth. UK labor-market and wage data are too noisy to precisely calibrate policy, so central bankers must rely more on judgment. US tariffs are unlikely to significantly raise UK inflation directly because only a small share of UK goods imports come from the US and much of that is oil. The bigger risk from tariffs is disorderly trade fragmentation, which could raise prices by limiting supply and forcing local sourcing. Brexit suggests trade barriers typically create one-off price increases rather than lasting inflation, but they can still damage growth and productivity. Monetary policy should generally look through temporary trade-induced price rises unless they occur in a context of already-elevated inflation and second-round effects. Brexit’s economic effects included faster import-price inflation, weaker real wage growth, and reduced business investment, offering a warning for other countries pursuing tariff barriers.

Data Points: UK trade importance score: 5/10 in normal times; 8/10 during major terms-of-trade shocks - Dhingra’s assessment of how important trade is for UK monetary policy UK consumption basket exposed to external factors: 35% to 40% - Direct imports plus energy and indirect imports plus energy in the UK consumption basket US consumption basket exposed to external factors: about 5% - Comparable estimate used to show the UK is much more open Inflation peak mentioned: 11% - UK inflation soon after Dhingra joined the MPC in 2022 Price increase over 2019-2022: 17% - Longer-term average price rise cited by Dhingra Share of the 17% price rise driven by external factors: 11 percentage points - Imports plus energy and externally set prices Energy share in the consumption basket: 3.5% nominally; around 8.5% when indirect energy content is counted - Illustrates hidden exposure through food and other goods US share of UK goods imports: 10% - Used to argue direct tariff pass-through from the US is limited UK import basket priced in dollars: 35% - Relevant for exchange-rate and dollar effects on import prices Business investment fall after Brexit uncertainty: 11% - Investment decline around September 2018 when businesses adjusted to Brexit uncertainty Real wage growth after Brexit: Almost no growth for about three years (2017-2019) - Attributed largely to sterling depreciation after the referendum Sterling depreciation after Brexit vote: about 10% - Immediate market reaction to the Sunderland vote outcome

Pivotal Quotes: "5 on 10 for the UK economy." — Swati Dhingra: Her answer on how important trade is for monetary policymaking "If I don't have good forward-looking data, you can't really be saying with a straight face that you're going to be doing purely evidence-based policy." — Swati Dhingra: Her critique of the UK data environment and the limits it places on policy decisions "This is not going to be something we should be losing sleep over for two years afterwards." — Swati Dhingra: Her view that orderly trade shocks usually create one-off price changes rather than persistent inflation

Implications: For listeners and policymakers, the message is that trade policy can quickly shape inflation, growth, and wages in open economies like the UK. Central banks should distinguish temporary price-level effects from persistent inflation, but also watch for fragmentation, exchange-rate swings, and data deterioration.