Why ‘China plus one’ is paying off less than Southeast Asia hoped

Southeast Asia has attracted investment under the “China plus one” strategy, but much of the region remains concentrated in lower-value assembly and reliant on Chinese inputs. Vietnam’s GDP grew 8.0% in 2025 and exports to the U.S. rose 28.1% to $153.2 billion, while imports from China increased nearly 30% to about $183 billion. Higher U.S. tariffs on several Southeast Asian countries, a narrower tariff gap with China, and competition from Chinese exports threaten some manufacturing gains; Thailand’s GDP growth has slowed to 2%.

Analysis

The key market implication is not simply where final assembly moves, but who owns the components, process know-how and supplier coordination. If those remain concentrated in China, ASEAN may absorb capex without capturing comparable pricing power; local component makers and labor-intensive manufacturers then face a two-sided squeeze from imported inputs and finished Chinese goods. Thailand’s auto ecosystem is particularly exposed to price-led EV competition, while Malaysia’s chip-packaging and data-center investment could attract higher-value activity—but capacity growth alone does not establish durable returns or local value capture.

For AAPL, continued reliance on Chinese component ecosystems makes relocation a resilience and execution trade-off, not a clean cost-saving catalyst. Broader diversification could reduce concentration risk over time, but fragmented suppliers may raise qualification, logistics and ramp costs. For TGT, the reported pull toward China may ease sourcing friction, but could increase exposure to tariff changes and renewed scrutiny of origin; verify the company’s actual sourcing mix before changing the view.

Near term, tariff enforcement and rules-of-origin scrutiny are the clearest catalysts for supplier shifts. Over 1–3 months, watch company disclosures for sourcing changes and Southeast Asian export composition—not headline investment announcements. Over 6–18 months, the structural test is whether local content and productivity improve. The contrarian risk is treating all China-plus-one capacity as stranded: assembly can still provide operating scale and optionality if suppliers deepen. Conversely, lower tariff gaps could quickly erode the case for marginal ASEAN capacity.

Key Decisions for Investors

• Do not trade a broad ASEAN short on this article alone. Prefer an underweight to pure assembly exposure only where issuer-level data shows weak local sourcing, low value added and direct competition from Chinese imports; confirm with local-content, margin and capacity-utilization disclosures.
• Keep AAPL as a supply-chain monitoring item, not a directional trade. Reassess if filings or supplier disclosures show a material shift in critical components or if diversification is accompanied by worsening product margins, launch execution or delivery metrics.
• For TGT, verify the share of sourcing actually moved back to China and the applicable tariff/origin treatment before changing exposure. A sustained sourcing reversal alongside higher landed costs or guidance pressure would weaken the case for the move.
• Track U.S. tariff differentials, origin-enforcement actions and ASEAN export/import data over the next 1–3 months. A further narrowing of the tariff gap or evidence that exports are mainly re-exports would falsify the near-term ASEAN manufacturing-upgrade thesis; rising local component content would strengthen it.