Mexico SE/UPCI — Resolución de Inicio: Antidumping Investigation on Mirror Glass Imports from China

Mechanism

The Mexican Ley de Comercio Exterior (1993) empowers UPCI to initiate antidumping investigations on petition from domestic industry. Vitro and Prodiesa filed their request on 30 January 2026, establishing a prima-facie case that Chinese mirror glass entered Mexico under price-discrimination conditions (i.e., export price below normal value in China) during the investigation period October 2024–September 2025. The damage analysis window extends back to October 2022 to capture trend deterioration. The DOF resolution was published 21 May 2026 and entered force the following day.

TIGIE classification 7009.91.99 covers silvered, aluminum-backed copper-free mirror glass in specified large-format dimensions (1,800×2,600 mm, 2,300×2,600 mm, 2,600×3,600 mm). This is distinct from flat float glass (which is covered by a separate parallel trade-remedy architecture — Mexico SE reached final determination in its clear float glass antidumping investigation against China and Malaysia in March 2026, imposing definitive compensatory duties).

Downstream implications

• First 2026 MX SE/UPCI antidumping-initiation filing on the register: fills the structural

gap in the Mexico trade-remedy stack — prior MX trade-remedy entries covered parent statutes and unilateral tariff decrees but no 2026 UPCI investigation initiations.

• First mirror-glass typology: the register has steel, aluminum, polyethylene, chemicals,

and paperboard typologies but no flat-glass-products trade-remedy filings before this action.

• Vitro strategic significance: Vidrio Plano de México (Vitro) is a USD 1.5bn-revenue

strategic Mexican flat-glass major (Monterrey-headquartered). Its petition represents the upstream domestic flat-glass manufacturing sector seeking relief from Chinese price pressure.

• China-target escalation in May 2026: this investigation was published on the same DOF date

(21 May 2026) as the parallel Mexico SE antidumping initiation on adhesive plastic tapes from China (TIGIE 3919.10.01, petitioners Industrias Tuk + Navi Lux), forming a coordinated same-day cohort of Mexico UPCI enforcement actions targeting Chinese manufactured goods.

• Procedural timeline: if UPCI follows standard timelines (typically 100–140 working days),

a preliminary determination could land Q4 2026; final determination Q1–Q2 2027.

Open questions

• Will UPCI impose provisional antidumping measures at the preliminary stage, or proceed directly

to a final determination without provisional duties?

• What are the specific margin-of-dumping calculations (the resolution only establishes the

investigation period; preliminary findings will first quantify alleged dumping margins)?

• Will the investigation be extended to additional source countries beyond China (e.g., Malaysia,

which was targeted alongside China in the parallel clear float glass investigation)?