Latin American Steel Slips as Gerdau and Ternium Fall

A steelworks. Latin American steel shares closed mixed on Wednesday. (Photo via Wikimedia Commons)

01 The session in one read

Wednesday brought a mixed close for Latin American steel, with construction-linked names lagging and one flat-steel winner. Gerdau, Brazil’s long-steel bellwether, fell -1.38% to US$4.99 on its New York ADR, the weakest among regional producers tracked by The Rio Times.

Mexico’s Ternium slipped -0.47% to US$56.98, giving back a slice of Tuesday’s strong gain. Brazil’s CSN went the other way, adding +0.83% to US$1.21. Global steel shares were broadly softer on the day.

Latin American steelmakers are caught between two forces: tariffs that protect their home markets and central-bank tightening that cools the construction they depend on. Gerdau’s decline shows investors pricing in slower building activity, while CSN’s gain suggests flat-steel producers still benefit from anti-dumping coverage. Watch Brazil’s monthly construction activity and Mexico’s auto output for the next signal.

02 The board

The price action split along product lines. Gerdau’s long-steel exposure to Brazilian homebuilding made it the session’s casualty, as the US Federal Reserve’s 25-basis-point rate hike rippled into construction finance. Long steel goes into rebar and beams, the skeleton of residential and commercial projects.

CSN’s rise showed the other side of the trade. Its sheet and coated products face less direct construction exposure and enjoy five-year anti-dumping duties on Chinese cold-rolled, coated and galvanised steel. Ternium’s modest decline kept it in the middle, cushioned by Mexico’s tariff structure on steel imports.

Source: RT close, 2026-09-16. Where a commodity has no spot feed, an exchange-traded tracker or leading producer is shown as a labelled proxy.

What Gerdau does. Gerdau S.A., together with its subsidiaries, operates as a steel producer company. It operates through Brazil Business, North America Business, and South America Business segments. The company offers rebars, bars, wires, thick plates, hot rolled coils, billets, blooms, plates, wire rods, and structural profiles. It also provides special steel products for agricultural,…

03 What moved it

The Federal Reserve’s 12-0 vote for a 25-basis-point rate hike set Wednesday’s tone, and 16 of 18 policymakers signalled another increase in 2026. Higher US rates pull global capital away from emerging markets and raise financing costs for Latin American builders, squeezing steel demand at the margin.

Cheap Chinese imports remain the structural threat. China supplied 45.4% of Latin America’s steel imports in 2025, and regional import penetration approached 39.7%. Brazil’s first-half 2026 penetration of 22.5% shows the tariff wall is not impenetrable.

Brazil’s 25% quota tariff on 19 steel product categories, in force through June 23, 2027, and its anti-dumping duties on Chinese flat products and wire rod are the main policy buffer. Mexico layers a 25% steel tax with a newer 5% to 50% tariff scheme, with steel lines near 20%.

04 The Latin American read

For foreign investors, the split between Gerdau and CSN illustrates how tariffs do not protect every steelmaker equally. Long-steel producers tied to construction feel the rate cycle first, while flat-steel makers with anti-dumping coverage can hold pricing power.

Mexico’s Ternium sits between the two worlds. Its flat-steel business serves auto plants and appliance makers, but its US$56.98 close shows investors still see tariff support outweighing the demand risk for now.

05 The names to watch

Gerdau is the purest proxy for Brazilian construction and the most sensitive to local mortgage rates. Any signal that Brazil’s central bank will follow the Fed higher would pressure the stock further.

CSN and Usiminas, Brazil’s other two large integrated steelmakers besides Gerdau, benefit from anti-dumping duties on the flat products central to their coil and sheet businesses. Ternium remains the Mexican flat-steel leader, with tariff protection on non-free-trade-agreement imports supporting its margins.

06 The outlook

The next move depends on whether Brazil and Mexico follow the Fed with their own rate hikes. Higher domestic rates would cool construction and auto demand, testing the tariff-driven margin support. The variable to watch is Chinese export pricing: if Chinese mills cut further to push steel into Latin America, even tariff walls may not stop volume leakage.

07 What to watch

• Brazil construction starts: The leading indicator for Gerdau’s long-steel demand; a drop would hurt the stock.
• Mexico auto output: Ternium’s flat-steel sales depend heavily on vehicle assembly; watch monthly production.
• China steel exports: Rising Chinese shipments to Latin America would undermine local pricing despite tariffs.
• Regional rate decisions: Further hikes by Copom or Banxico would deepen the construction and auto slowdown.

Frequently Asked Questions

Why did Gerdau fall on Wednesday?

Gerdau’s New York ADR dropped 1.38% to US$4.99 as the Federal Reserve’s rate hike raised borrowing costs for Brazilian construction, weakening the long-steel demand outlook.

How do Brazil’s steel tariffs work?

Brazil imposes a 25% tariff on steel imports above quotas across 19 product categories, running through June 23, 2027, plus five-year anti-dumping duties on Chinese cold-rolled, coated, galvanised and wire rod.

What is Mexico’s steel tariff structure?

Mexico applies tariffs of 5% to 50% across 1,463 tariff lines, with steel around 20%, plus a separate 25% steel tax on non-free-trade-agreement imports in force since August 2023.

How much Chinese steel does Latin America import?

Chinese mills supplied 45.4% of Latin America’s steel imports in 2025, and Brazil’s first-half 2026 import penetration hit 22.5% despite tariff walls.

Market data: RT

This article was produced by The Rio Times’ automated newsroom system. How we use AI · Report an error

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