Tariffs, Trade Wars, and Your Portfolio: How Value Investors Should Respond in 2026

Markets hate uncertainty. Value investors, at their best, are supposed to thrive in it. That is the theory. The practice requires more discipline because tariff-driven volatility feels different from a normal correction. The headlines are persistent, the policy outcomes are genuinely unpredictable, and the second-order effects on supply chains and corporate margins are harder to model than a simple revenue decline.

I have been through two significant tariff regimes in my investing career: the brief but sharp volatility around Smoot-Hawley comparisons in 2018–2019, and the current 2025–2026 escalation. The lessons from the earlier period are the most relevant, because they taught me both how much damage tariffs can do to specific businesses and how many of the market’s fears turn out to be overpriced.

This article lays out my framework for thinking about tariff exposure in portfolio holdings, the specific factors that separate vulnerable businesses from resilient ones, and a practical stress-test you can run on any position in your portfolio right now.

Key Takeaways

• Tariff risk is not uniform: domestic revenue mix, pricing power, and supply chain flexibility are the three factors that matter most
• The market frequently overreacts to tariff announcements, creating temporary discounts in businesses with genuine tariff resilience
• History (Smoot-Hawley, 2018–2019 trade war) shows that tariff escalation rarely destroys well-capitalized businesses with strong domestic demand
• Small-cap domestic businesses are often more insulated than they appear and more interesting to value investors for that reason
• A three-variable stress test can help you quickly rank holdings by tariff vulnerability

What the History Actually Tells Us

Smoot-Hawley: The Cautionary Tale

The Smoot-Hawley Tariff Act of 1930 is the historical worst-case scenario for protectionist trade policy. Tariffs on over 20,000 imported goods triggered retaliatory measures from trading partners, global trade volumes fell sharply, and the policy arguably deepened the Great Depression. Every time tariffs escalate today, Smoot-Hawley gets invoked.

But context matters. Smoot-Hawley came at the worst possible time: a banking system already under severe stress, a deflationary spiral already underway, and an international monetary system ill-equipped to absorb the shock. The 2018–2019 and 2025–2026 tariff environments are different on all three dimensions: stronger banking systems, near-target inflation (or above-target, which tariffs can worsen), and a more flexible monetary policy response.

That does not mean tariffs are benign, they are not. They are a tax on consumption and a distortion of production. But equating them to Smoot-Hawley is an overreaction that has consistently created opportunities for patient value investors.

2018–2019: The Template

The US-China trade war of 2018–2019 is the better historical analogue for today. The escalation pattern was similar: tariff announcement → market selloff → retaliatory measures → further selloff → partial resolution → relief rally. Throughout this cycle, certain businesses were genuinely impaired (agricultural exporters, semiconductor manufacturers with high China revenue exposure, specific retailers with China-sourced supply chains). Many other businesses, particularly domestic service businesses, US-focused manufacturers, and companies with pricing power recovered quickly and fully.

The investors who did best were the ones who identified businesses with genuine tariff insulation before the relief rally, not after it.

For more context on the current policy environment, see my article on Trump’s economic policies and how they affect the investment landscape.

The Three Factors That Determine Tariff Vulnerability

Not all tariff exposure is equal. When I assess a company’s vulnerability, I focus on three factors in order of importance.

Factor 1: Domestic Revenue Mix

The simplest and most powerful screen. A company that generates 90%+ of its revenue from US domestic demand is insulated from direct tariff impact. It does not export significantly, so retaliatory tariffs do not hurt its top line. It does not rely on imported inputs as a primary cost driver. Its customers are US-based and largely unaffected by trade policy.

Small-cap domestic businesses such as local healthcare services, US-focused specialty retailers, regional financial services, and domestic infrastructure contractors often fall into this category. This is one of the reasons I find small-cap value investing particularly interesting in a tariff environment: the domestic orientation that makes these businesses overlooked by large institutions also makes them naturally insulated from trade war fallout.

How to check: The 10-K geographic revenue breakdown (usually in the segment footnotes) shows what percentage of revenues comes from outside the US. For domestic-focused businesses, this number is small or zero.

Factor 2: Pricing Power

A company that can pass through cost increases to customers because of brand strength, switching costs, scarce expertise, or contractual pricing mechanisms is far more resilient to tariff-driven input cost inflation than one that cannot.

Consider a specialty industrial distributor that sources some components from overseas: if that company has exclusive or near-exclusive supply relationships with its customers, and if those customers lack viable alternatives, the distributor can pass tariff-related cost increases through to its pricing. The margin is protected.

Contrast this with a commodity manufacturer in an intensely competitive market: it faces the same input cost inflation but cannot raise prices without losing volume. Margin compression is inevitable, and the question becomes how long the business can absorb it.

Pricing power or the absence of it is the difference between a tariff-impacted business that recovers its margin within 12–18 months and one that sees permanent margin erosion. My article on economic moats covers the structural factors that create durable pricing power.

How to check: Historical gross margin stability through prior cost cycles (2018–2019 tariffs, 2021–2022 input cost inflation) is the most reliable signal. Companies that held margins in prior cycles will likely do so again.

Factor 3: Supply Chain Flexibility

A company that sources exclusively from China and has invested heavily in those supply chain relationships is far more exposed than one that has diversified its sourcing or has the flexibility to shift production.

When assessing supply chain flexibility, I look at:

• Whether the company discloses concentration in a single country of origin
• Whether the MD&A discusses supply chain diversification initiatives (often started after 2018–2019 and accelerated after 2020)
• The capital requirements for reshoring or nearshoring (high capex requirements reduce flexibility)
• Whether the product could realistically be sourced from multiple geographies or is tied to specific manufacturing capabilities

A company that began diversifying its supply chain in 2020 is in a fundamentally different position today than one that continued to deepen China concentration. These differences show up in the 10-K risk factors and MD&A if you read carefully.

A Practical Stress Test for Portfolio Holdings

Here is the three-variable stress test I run on each holding when tariff risk escalates. Rate each factor from 1 (highly vulnerable) to 3 (well insulated):

Variable 1 — Domestic Revenue Mix:

• 1 = Greater than 30% non-US revenue, significant export exposure
• 2 = 15–30% non-US revenue, limited export exposure
• 3 = Less than 15% non-US revenue, domestic-focused business

Variable 2 — Pricing Power:

• 1 = Commodity pricing, no differentiation, highly price-competitive market
• 2 = Some differentiation, limited pricing power, moderate competitive intensity
• 3 = Strong brand, switching costs, or contracted pricing mechanisms

Variable 3 — Supply Chain Flexibility:

• 1 = Highly concentrated in tariff-affected geographies, capital-intensive reshoring
• 2 = Moderate concentration, diversification underway or feasible
• 3 = Diversified sourcing, domestic supply chains, or service-based (no physical supply chain)

Score interpretation:

• 7–9: Low tariff vulnerability. Likely to be resilient or even benefit from competitor disruption
• 4–6: Moderate vulnerability. Monitor carefully, may offer buying opportunity if oversold
• 3: High vulnerability. Tariff risk is real and may impair earnings for an extended period; require extra margin of safety or avoid entirely

This score does not replace full analysis, but it gives you a rapid-ranking tool for a portfolio of 15–20 positions during a period when every headline is triggering market moves.

Where I See Opportunity in the Current Environment

The market’s indiscriminate selling of any company that touches international trade creates opportunities in businesses that are being tarred with the same brush as genuinely vulnerable companies.

Specifically, I am interested in:

Domestic service businesses sold off due to macro fear: These companies have essentially zero direct tariff exposure but get sold with the market during broad risk-off moves. This is pure sentiment-driven discount, not fundamental impairment.

Small domestic manufacturers with pricing power: A US-based specialty manufacturer with strong customer relationships and a diversified domestic supply chain may actually benefit from tariffs if competitors rely on imported components. Market fear creates the discount; the reality is a competitive tailwind.

Cyclical businesses at trough margins: Cyclical stocks at trough earnings, where the tariff impact is already being modeled into analyst forecasts and priced in, can offer significant upside if the policy environment normalizes. The key is that the balance sheet must be strong enough to survive an extended downturn, something I always check before buying a cyclical at trough. My article on portfolio resilience discusses how to think about balance sheet durability in uncertain environments.

What Value Investors Should Not Do

A few behaviors I try to avoid specifically in tariff-volatile environments:

Do not sell resilient businesses out of macro fear. If you have done the stress test and a holding scores 7–9, selling it because of tariff headlines is reacting to noise. The market will reprice the distinction between resilient and vulnerable businesses eventually.

Do not buy highly tariff-exposed businesses just because they are cheap. Cheap for a good reason is the classic value trap. A business with 40% China-sourced inputs, thin margins, and no pricing power might look statistically cheap on a P/E basis. But if tariffs materially impair its earnings power for 18–24 months and it is carrying debt, “cheap” can keep getting cheaper. See my article on common value investing mistakes for more on this pattern.

Do not over-trade. Tariff headlines move daily. Acting on each headline is a way to generate transaction costs, tax friction, and emotional exhaustion without improving your outcomes. Set your thesis, do the stress test, and let the business perform.

The Bottom Line for 2026

Tariff volatility is uncomfortable. It is also, historically, a source of opportunity for investors disciplined enough to distinguish between businesses that are fundamentally impaired and businesses that are being temporarily discounted by indiscriminate selling.

The margin of safety you require is your shock absorber. Businesses with low tariff vulnerability scores, strong balance sheets, and a meaningful discount to intrinsic value are the ones I want to own through this period. Businesses that are cheap because of tariff vulnerability require a much larger discount, and often, a much better understanding of how and when the impairment resolves.

For a deeper look at how tariff scenarios might affect the broader investment thesis in a potential recession, see my upcoming piece on value investing through tariffs and recession.

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Disclosure: I may hold positions in some of the stocks mentioned. This article is for informational purposes and does not constitute investment advice.

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