How do trade wars affect equity sectors differently?

The short answer

Trade wars are not uniform shocks. They redistribute corporate margins across sectors based on import dependence, export exposure, and position in global supply chains.

The intuition that “tariffs hit consumer goods” is partially right — but the deeper damage often falls on intermediate goods producers, capital goods makers, and shipping companies that absorb the friction of supply chain rerouting.

What complicates the picture is that the response of currencies and central banks can amplify or dampen the original shock. A trade-war-induced dollar appreciation can hurt US exporters more than the tariffs themselves help domestic producers.

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What the data shows

The numerical record on US-China trade war tariff effects (USTR, IFS, S&P sector data):

• Final Section 301 tariff rates (Sept 2024): EVs 100%, semiconductors 25-50% rising, batteries 25%, critical minerals 25%, syringes 100%, ship-to-shore cranes 25%
• Total US-China bilateral trade affected by Section 301: approximately $370 billion (USTR estimates)
• S&P 500 reaction August 2019 (when Trump tweeted new tariffs): -3% in 2 days, -7% over the month
• Mexico FDI surge 2022-2024: from $35bn average annually to $40bn+ as supply chains shifted away from China (BEA, USTR)
• China share of US imports: from 21.6% (2017 peak) to 13.4% (2024) — a 38% relative decline

The exception that nuances the headline tariff numbers: the tariffs apply only to direct imports of listed products. They do not apply to downstream products or finished goods routed through third countries — meaning a Chinese-made component finished in Vietnam often escapes the tariff entirely. This loophole has driven much of the supply chain rerouting visible in trade statistics.

→ Dataset: S&P 500 historical returns

Why it happens — the macro mechanism

Three channels explain the asymmetric sectoral impact of trade wars.

Channel 1: direct tariff incidence. Tariffs on EVs at 100% directly target Chinese EV makers (BYD, Nio) but their US listings are limited. Tariffs on semiconductors hit Chinese fabs but most US semiconductor companies (Nvidia, AMD) are designers, not manufacturers, so direct exposure is limited. The textbook losers — directly tariffed consumer goods — are often a minority of the actual market damage.

Channel 2: supply chain spillovers (the unexpected losers). Industrial machinery firms (Caterpillar, Deere) and semiconductor equipment makers (Applied Materials, Lam Research) suffer disproportionately because their customers reduce capex amid trade uncertainty. Shipping companies absorb rerouting costs. Capital flow disruption hurts producers of long-cycle capital goods more than producers of short-cycle consumer goods.

The asymmetry: directly tariffed goods get political attention; intermediate goods bear hidden damage.

Channel 3: currency feedback loops. Trade wars trigger central bank responses (potential rate cuts) and currency devaluations. The yuan fell from 6.3 to 7.3 per dollar between 2018 and 2024, partially offsetting US tariffs — but the same dollar strength hurt US multinationals’ overseas earnings. The S&P 500’s overseas-revenue-heavy mega caps faced earnings translation losses while domestic small-caps benefited modestly.

Synthesis by regime. Pre-2018 was a regime of expanding trade integration where tariff disputes were rare and limited (e.g., steel safeguards 2002). 2018-2024 saw the bipartisan US shift to industrial policy with rising tariffs across administrations: directly affected sectors (consumer electronics, batteries, EVs) reacted predictably; the unexpected losers were US multinationals with China-connected supply chains and dollar earnings translation pressure. Post-2024 with second-Trump tariffs, the regime shifted again toward broader-based tariffs (proposed across 60 economies), making sector-specific positioning harder and pushing the impact to currency and inflation channels.

Trade wars produce victims that cluster not at the tariff line but at the supply chain link — which is why naming the targeted product rarely identifies the most damaged stock.

→ Framework: Deglobalization and supply chain fragmentation

What it means for different economic actors

Savers exposed to broad US equity indices have generally seen muted aggregate impact from US-China trade tensions, because the index is dominated by service and software companies with limited direct goods exposure. The S&P 500 ended 2018 down 4% despite escalating tariffs — most of the damage was concentrated in industrials.

Investors running sector-specific strategies need to look beyond first-order tariff incidence. Mid-cap industrials, semiconductor capex, and shipping have been the more reliable losers; defense and on-shoring beneficiaries (Mexican-exposed industrials) have been the winners.

Multinationals and corporate treasurers have spent 2018-2024 redesigning supply chains: “China+1” strategies, Mexico nearshoring, Vietnam transshipment. The cost of these changes is visible in compressed margins for goods producers throughout the period.

A common error is to assume the directly tariffed sector is the most damaged stock. Empirically, the supply chain spillovers and currency effects have been larger than direct incidence in most US sector indices.

Practical observation

Go deeper

Related questions

• What is the risk of US-China decoupling for markets?
• How do wars affect financial markets historically?
• What is sector rotation across cycles?
• How do exchange rates affect trade balances?

Frequently asked questions

Did the 2018-2024 US-China tariffs reduce US imports from China?

Yes, but partially. China’s share of US imports fell from a 21.6% peak in 2017 to 13.4% in 2024 — a 38% relative decline. However, USTR economic analysis and ITC studies note that much of this decline reflects rerouting through third countries (Vietnam, Mexico, Malaysia) rather than genuine onshoring. The actual reduction in Chinese-component content of US final demand is smaller than the headline import share suggests.

Why did the S&P 500 not crash during the 2018-2024 tariff cycle?

The aggregate index is dominated by services, software and finance — sectors with limited direct goods exposure. The damage was real but concentrated in industrials, materials and consumer-discretionary mid-caps, which together represent less than 25% of S&P 500 weight. The Fed’s policy response (rate cuts in 2019) also offset some equity damage. The lesson: index-level analysis hides large sectoral redistributions that matter for active investors.

Are tariffs inflationary?

Yes, but with caveats. Empirical studies (Cavallo et al. 2021, Amiti-Redding-Weinstein 2019) find that the bulk of tariff incidence falls on US importing firms and consumers, not Chinese exporters. The Fed estimated the 2018-2019 tariffs added approximately 0.3 percentage points to core inflation. Larger 2025-2026 tariffs across 60 economies could add 1-2 percentage points to core inflation, depending on currency offset and pass-through. The transmission lag is typically 6-12 months.

Last updated — 29 May 2026