Southeast Asian economies prove resilient in the face of Trump’s tariffs as supply chains expand

U.S. tariffs implemented in 2025 (effective Aug. 1) and steep 40% duties on Chinese goods prompted extensive transshipping through ASEAN, lifting ASEAN imports (with average tariffs around 10%) and coinciding with record two-way U.S.–Southeast Asia trade of $453 billion in 2024. Macquarie and Maybank note ASEAN growth remained resilient at +4.8% in 2025, aided by tariff exemptions for electronics, pharmaceuticals, energy and minerals, China’s upgraded ACFTA 3.0, and bilateral U.S. deals with Thailand, Malaysia, Cambodia and Vietnam, while US–China tensions persist and further dealmaking (including potential agreements affecting Mexico and Canada, which account for ~27% and ~32% of U.S. exports) is expected into 2026.

Analysis

Market structure: The tariff regime creates a clear margin wedge — ~40% on direct China→US vs ~10% on ASEAN transshipped goods — giving ASEAN exporters, ports and freight-forwarders a 25–35 percentage-point competitive advantage on affected goods. Expect 5–15% of China-origin export volumes to re-route through Vietnam/Thailand/Malaysia within 6–12 months, supporting regional manufacturing capex, FX and sovereign spreads. US importers of consumer goods and Chinese coastal exporters are the direct losers; pricing power shifts toward logistics providers and ASEAN contract manufacturers.

Risk assessment: Key tail risks are rapid dealmaking (Trump/administration cuts tariffs to <15% within 3–9 months) or aggressive rule-of-origin enforcement that crimps transshipment — both would reverse flows quickly. Short-term (days–weeks) risks include customs crackdowns and supply bottlenecks at ASEAN ports; medium-term (months) risks include local wage inflation and capacity limits. Monitor three triggers: official tariff cuts, published customs enforcement actions, and ASEAN PMI moving below 48 for two consecutive months.

Trade implications: Tactical overweight ASEAN equities/FX and underweight China exporters is warranted for a 6–12 month horizon. Relative value: long ASEAN equity ETF exposure and short large-cap China exporters; add directional FX longs in MYR/THB and selective long exposure to regional ports/logistics equities. Use options to cap downside and express asymmetry if headlines accelerate dealmaking by mid-2026.

Contrarian angles: The market underestimates capacity constraints — transshipment is not frictionless; labor and logistics bottlenecks can cap gains and induce margin pressure by H2 2026. Historical parallel: 2018 tariffs rerouting to Mexico showed rapid but uneven flow shifts and subsequent local inflation. Unintended consequence: rising ASEAN wages and CAPEX could reprice industrial suppliers and benefit heavy-equipment makers more than garment exporters.

Key Decisions for Investors

• Establish a 2–3% NAV long position in AAXJ (iShares MSCI All Country Asia ex-Japan ETF) with a 6–12 month horizon to capture ASEAN export re-routing; scale in over 2 tranches and take profits if U.S. announces China tariff cuts to <15% (sell half) or ASEAN PMI <48 for two months (exit full).
• Initiate a pair trade: long AAXJ 2% NAV, short FXI (iShares China Large‑Cap ETF) 1–2% NAV to express ASEAN vs China reallocation; hedge with 6–9 month FXI puts (buy 6–9 month 10–15% OTM puts) sized to limit drawdown to ~1% NAV.
• Allocate 1% NAV each to MYR and THB long positions via forwards or liquid FX ETFs, target 3–7% appreciation over 3–9 months, set hard stop-loss at 4% adverse move and unwind if Malaysia/Thailand 10‑yr spreads widen by >50bps vs. regional peers.
• Buy a 9‑month call spread on AAXJ (e.g., buy 15–25% OTM calls, sell 40% OTM calls) sized ~0.5–1% NAV to get upside with defined cost; simultaneously buy 9‑month puts on FXI as insurance. Exit both if a bilateral US‑China tariff deal reducing tariffs below 15% is announced or if customs enforcement targeting transshipment is published by major ports.