Round two of US-Mexico USMCA talks started in Mexico City this week. The negotiation is running on four parallel tracks: autos, steel, agriculture, and Chinese content. Each one hits different companies on the IPC. Most investors are not making this distinction.
The IPC broke back above 70,000 on Monday. The market is pricing optimism: carry trade intact, World Cup in June, Banxico likely to keep easing. The USMCA review, formally due July 1, gets mentioned in every macro note as a “risk factor” and then promptly ignored in the positioning.
This is a mistake. Not because the USMCA will collapse (it will not), but because the negotiation is not a single event with a binary outcome. It is four distinct negotiating tracks running simultaneously, each with different probabilities, different timelines, and different transmission mechanisms into specific listed companies. Treating “USMCA risk” as a single line item in your risk matrix is like treating “weather” as a single variable when you own both a ski resort and a beach hotel.
USTR Jamieson Greer arrived in Mexico City on April 20 for technical working sessions covering autos, steel and aluminum, agriculture, and rules of origin coordination. These follow a first round held in Washington in March. The US position has hardened since our January article on the review: Greer told Congress in December that a “rubber stamp is not in the national interest.” CSIS now assigns the highest probability to what it calls a “painful extension,” where negotiations stretch past July into late 2026, with meaningful concessions extracted in autos and Chinese content rules.
That assessment is the base case. What follows is what we think investors should actually do with it.
Track 1: Auto rules of origin
This is the track that matters most for Mexican equities, and the one where the US has the most leverage and the clearest demands.
The current USMCA requires 75% regional value content (RVC) for vehicles to qualify for duty-free treatment, plus a labor value content (LVC) rule requiring 40-45% of content to come from workers earning at least USD 16 per hour. The US wants to tighten both. Senator Moreno said at the Detroit Auto Show that there “is not even a question” that revised rules will require more US final assembly. The USITC just launched its third investigation into auto ROO impact in February, with a report due July 2027.
For Mexican auto parts makers, this creates a two-sided exposure. Tighter RVC requirements increase the compliance value of North American-sourced components, which benefits companies like Nemak (aluminum engine blocks, cylinder heads, structural components) whose entire production base is in USMCA territory. If OEMs need to prove more regional content, Nemak’s components become more valuable in the compliance calculation, not less. But tighter LVC thresholds could pressure margins if wage floors are raised, and any disruption to the compliance framework creates uncertainty that freezes OEM procurement decisions.
Nemak trades at roughly 6x EV/EBITDA. The market treats it as a cyclical auto parts supplier. We think it is more accurately described as a USMCA compliance asset, and the current valuation does not reflect that distinction.
Track 2: Steel and aluminum
Section 232 tariffs on steel and aluminum remain in effect alongside the USMCA, creating a layered tariff structure that the review may attempt to rationalize. The US is pushing for stricter “melted-and-poured” requirements, which would require that the steel or aluminum used in qualifying products be melted and poured within North America, not just processed or finished.
For equities, the transmission runs through construction costs. Industrial FIBRAs (FIBRAPL, Vesta, FIBRAMQ) are in the middle of expansion cycles driven by nearshoring demand. Their development pipelines assume specific construction cost trajectories. If melted-and-poured rules raise the cost of structural steel for warehouse and factory construction, FIBRA development yields compress. This is not existential, but it matters at the margin: a 200-300 basis point compression in yield-on-cost changes the math on speculative development.
Grupo Mexico sits on the other side of this trade. As a domestic smelter and metals producer, stricter sourcing rules could increase demand for its output. The company’s diversification across mining, transportation, and infrastructure limits the downside from any single USMCA outcome. The market seems to understand this: we consider the steel/aluminum track fairly priced into current valuations.
Track 3: Agriculture
Mexico’s restrictions on genetically modified corn imports have been a persistent US grievance, the subject of a formal USMCA dispute panel, and a topic that generates more political heat than economic consequence for listed equities. The agricultural track matters politically, but its direct impact on the IPC is limited.
Gruma is the most exposed name. As the world’s largest tortilla producer, Gruma’s input costs are directly affected by corn trade policy. Any resolution that opens Mexico further to US GM corn would lower Gruma’s raw material costs, a positive for margins. But Gruma’s dual listing and US operations (Mission Foods) mean the company benefits from USMCA continuity regardless of which side of the corn debate prevails. WALMEX faces second-order effects through food price volatility, but the connection is indirect and buffered by the company’s pricing power.
Our assessment: the agricultural track is the least likely to produce changes that move stock prices. Both governments have too much domestic political capital invested in their current positions to make meaningful concessions. We think the market, if anything, overweights agricultural risk relative to the other tracks.
Track 4: Chinese content restrictions
This is the track nobody in English-language equity research is writing about, and the one we think carries the most underappreciated risk for specific names.
The US has made clear that the USMCA was never intended to serve as a conduit for Chinese manufacturing to access the US market through Mexico. Chinese firms have leased over 5 million square meters of industrial space in Mexico. Some of this is genuine nearshoring: Chinese companies building plants to serve the North American market using North American inputs. Some is closer to transshipment: minimal transformation of Chinese-origin goods in Mexico to qualify for USMCA preferential treatment.
The review is expected to introduce stricter rules on non-market economy content, potentially disqualifying products with significant Chinese-origin inputs from USMCA benefits. For investors, the question is: which companies on the IPC have benefited from Chinese-origin nearshoring demand, and what happens to their growth rates if that demand is restricted?
OMA is the clearest case. Its 8.5% traffic growth in 2025, the best among the three airport groups, is driven by Monterrey and the industrial north, where Chinese investment has been concentrated. OMA’s management cites nearshoring as the primary growth driver, but the company does not disaggregate its traffic data by the nationality of the businesses driving the cargo and business travel. If Chinese-linked manufacturing is restricted or rerouted, some fraction of OMA’s traffic growth evaporates. How much? We do not know, and neither does the market, which is exactly the problem.
Industrial FIBRAs face a similar exposure. The vacancy rates near historic lows that we highlighted in our January article on the sector are partially a function of Chinese lessees taking space. If those leases do not renew, or if new Chinese-origin tenants are deterred by tighter USMCA rules, the supply-demand balance shifts.
USMCA negotiation tracks and IPC exposure
Four parallel negotiating tracks, mapped to the specific Mexican listed companies each one affects.
| Negotiation track | IPC names exposed | Exposure | Transmission mechanism | Market pricing the risk? |
|---|---|---|---|---|
| Auto rules of origin RVC thresholds, LVC requirements, EV battery content | Nemak NEMAKA Grupo Mexico GMEXICOB (mining/metals) | High | Tighter RVC forces OEMs to source more parts from high-cost plants or pay MFN tariff. Nemak's aluminum components are core to compliance calculations. Higher content thresholds raise Nemak's pricing power but also increase customer scrutiny of sourcing. | Underpriced Nemak trades at ~6x EV/EBITDA, well below sector. Market treats it as cyclical, not as a USMCA compliance asset. |
| Steel and aluminum Section 232 tariffs, melted-and-poured rules | Grupo Mexico GMEXICOB Industrial FIBRAs FIBRAPL, VESTA | Moderate | Stricter melted-and-poured requirements could raise costs for industrial construction (steel-frame buildings, warehouses). FIBRA development pipelines face margin compression if steel input costs rise. Grupo Mexico benefits if domestic smelting demand increases. | Fairly priced FIBRAs have already absorbed steel cost inflation in 2024-25. Grupo Mexico's diversification limits downside. |
| Agriculture Corn, dairy, biotech approvals, seasonal produce | Gruma GRUMAB WALMEX WALMEXV | Moderate | Mexico's GM corn import restrictions remain a US grievance. Any resolution that opens Mexico further to US corn benefits Gruma (lower input costs) but is politically toxic domestically. WALMEX faces food price volatility if agricultural trade terms shift. Gruma also has US operations (Mission Foods) that benefit from USMCA continuity. | Overpriced risk Agricultural provisions are the least likely to change materially. Both sides have too much to lose. |
| Chinese content restrictions Non-market economy inputs, transshipment, EV exclusions | OMA OMAB Industrial FIBRAs FIBRAPL, FIBRAMQ Nemak NEMAKA | High | Chinese firms have leased 5mm+ sqm of Mexican warehouse space. Restrictions on Chinese-linked manufacturing would reduce demand for industrial real estate and cargo traffic at northern airports. OMA's nearshoring-driven traffic growth (8.5% in 2025) is partially built on Chinese-invested supply chains. Nemak must prove its supply chain is "clean" of non-market inputs. | Underpriced OMA is priced as a pure nearshoring winner. The market has not disaggregated Chinese-origin vs. US/allied nearshoring in the traffic data. |
Source: The Investment Case analysis based on USTR negotiation agenda, company filings, CSIS scenario analysis, and BMV data. April 22, 2026.
The pricing gap
The IPC at 70,000 is pricing a constructive macro environment: Banxico easing, peso stability, nearshoring momentum, World Cup tourism. The USMCA is treated as a known risk with a known base case (painful extension, eventual renewal). What the market is not doing is differentiating between companies whose businesses are structurally aligned with the direction of the negotiation and companies whose recent performance depends on dynamics the negotiation is specifically designed to restrict.
Nemak’s compliance value increases under tighter auto ROO. Gruma benefits from USMCA continuity regardless of agricultural outcomes. These are structural longs through the review. OMA’s nearshoring traffic growth needs to be disaggregated by origin before an investor can confidently hold the name through July. Industrial FIBRAs need a tenant-by-tenant analysis that the public data does not currently support.
The bottom line
The USMCA review is not one risk. It is four simultaneous negotiations with four different sector maps. The IPC-level impact may be modest: CSIS’s base case of a painful extension does not change the fundamental trade architecture. But the company-level dispersion could be significant.
Investors holding Mexican equities through July should map each position to the specific negotiation track that affects it, assess whether the current price reflects the range of outcomes on that track, and decide whether the risk-reward justifies the position on a name-by-name basis. The sector exposure chart above is a starting framework.
We wrote in January that July 1 is a clock-reset, not a deadline. That remains true for the agreement itself. But for specific companies on the IPC, the next 70 days will reveal which growth stories are structurally sound and which ones were borrowing from a trade framework that is about to be rewritten.