China Steps Up Pressure on Nvidia and US Chipmakers as Madrid Trade Talks Continue

Two chip investigations sharpen the trade dispute

China has accused Nvidia of breaking commitments attached to its 2020 purchase of Mellanox Technologies and opened an anti dumping investigation into American chips used in cars, factories and household electronics. As of September 16, 2025, both actions add pressure on United States semiconductor companies while senior officials from the two countries hold sensitive trade talks in Madrid.

The State Administration for Market Regulation, known as SAMR, said a preliminary investigation found Nvidia had failed to honor commitments connected to the acquisition. The regulator is continuing its inquiry. Separately, the Ministry of Commerce opened a full investigation into commodity interface integrated circuits and gate driver chips from Texas Instruments, Analog Devices, Broadcom and ON Semiconductor.

Industry data submitted to Beijing says Chinese imports of the targeted chips increased 37 percent between 2022 and 2024, while average prices dropped 52 percent. The complaint alleges dumping margins of up to 300 percent and says chips originating in the United States account for 41 percent of China's market for the products under investigation.

The announcements came only days after Washington added 23 Chinese companies to its Entity List on national security grounds. Washington has also tightened restrictions on advanced semiconductors and chipmaking equipment supplied to China. Beijing is using competition rules and trade investigations to challenge foreign suppliers it considers to be undercutting domestic producers or breaking earlier promises.

The two cases reach different parts of the electronics industry. Nvidia's case concerns the networking technology behind large artificial intelligence systems. The trade investigation concerns less advanced components sold in huge volumes, meaning any resulting restrictions could affect businesses far beyond the companies building AI systems.

Why the Mellanox purchase is under scrutiny

Nvidia acquired Mellanox Technologies, an Israeli networking specialist, in 2020. China's approval carried conditions intended to protect competition and maintain reliable access for Chinese customers. SAMR's preliminary finding says Nvidia violated elements of those commitments.

Mellanox makes InfiniBand and Ethernet networking equipment and software. Inside a data center, these connections allow thousands of graphics processors, also called accelerators, to exchange information while training artificial intelligence models. The processors perform calculations; the networking equipment helps them work together.

Nvidia has developed an integrated platform combining its chips, networking connections and software since the acquisition. Chinese regulators opened their investigation in December and now say it remains underway.

Possible remedies range from fines to requirements that Nvidia change its business practices. In previous cases involving global technology acquisitions, China has sought equal treatment in supply, transparent prices and contractual promises against bundling products in ways that shut out competitors.

SAMR has not specified which measures it is considering for Nvidia, including whether it might demand structural changes to the way the Mellanox networking business is sold and supported in China. The immediate issue for customers is therefore both the continuing investigation and uncertainty about the terms on which they may buy equipment.

Nvidia faces pressure from both governments

United States export restrictions have already changed Nvidia's business in China by limiting access to its most powerful accelerators. The company developed versions designed to meet those rules, including the H20, which Washington recently allowed to be shipped.

Chinese agencies have raised security concerns about H20 chips and urged some local buyers to choose domestic alternatives. Export permission from Washington and security objections from Beijing are pulling the same product in different directions, complicating Nvidia's plans to sell compliant chips in China.

Nvidia said it would work with regulators when asked about the antitrust finding. A company spokesperson stated:

We comply with the law in all respects.

The company has signaled that it wants to continue serving Chinese customers despite the restrictions. Businesses are also lobbying for narrow permissions that allow some sales, while both governments retain the ability to tighten their controls at short notice.

Which everyday components China is investigating

The Ministry of Commerce investigation focuses on analog and mixed signal components made using mature manufacturing processes, rather than the most advanced processors. The Jiangsu Semiconductor Industry Association filed the complaint, arguing that American suppliers shipped large quantities of commodity interface chips and gate driver integrated circuits at sharply reduced prices below fair value.

Analog chips handle signals connected to the physical world. They regulate power, sense temperature and pressure, control motors and help digital systems interpret those signals. Gate drivers control power transistors, components that switch or regulate electrical power in electric vehicles, industrial machinery and consumer devices.

The products support cars, factory automation, appliances, battery management, display panels and energy systems. Changes in their prices or availability can therefore spread through many industries, even though these chips attract less attention than processors used for artificial intelligence.

The complaint's figures describe a large change over two years: import volumes rose 37 percent from 2022 to 2024 as average prices fell 52 percent. It also alleges dumping margins reaching 300 percent and a 41 percent market share for products originating in the United States. Those are the industry's claims being examined through the formal investigation.

For Chinese producers, the case concerns whether falling import prices have damaged their businesses. For Chinese manufacturers buying the chips, the potential concern is higher costs or a need to change suppliers if Beijing imposes duties.

How dumping claims can lead to duties

Dumping, in trade law, means exporting a product below its normal value in a way that injures an industry in the importing country. Normal value is typically based on the price charged in the exporter's home market or on a calculation of production costs.

A dumping margin measures the gap between the export price and that benchmark. Authorities that confirm dumping and injury can impose duties intended to offset the difference. The alleged margin of up to 300 percent is therefore central to the scale of the possible restrictions.

China's procedures mirror World Trade Organization rules. Provisional measures can follow a preliminary finding, while final anti dumping duties typically remain in force for five years and can be extended. Companies sometimes offer price undertakings, commitments about their selling prices, to avoid or reduce duties. Those arrangements require approval and close monitoring by regulators.

The Commerce Ministry's notice indicates that investigators will examine shipment and pricing patterns from 2022 onward. Beijing says the inquiry follows complaints from local industry, a common requirement for opening such proceedings.

Investigators will assess claims that aggressive discounting to gain market share, or subsidized production in the United States, distorted the Chinese market. If the allegations survive that examination, American suppliers could face steep tariffs or other restrictions lasting years.

Why American chip subsidies are part of the dispute

Chinese officials have also indicated that they will examine grants and tax credits under the United States Chips and Science Act, together with incentives provided by individual states. Their argument is that public support can lower American producers' costs, affect export prices and hurt Chinese competitors.

The Chips Act directs tens of billions of dollars toward semiconductor manufacturing, research and workforce programs in the United States. Washington presents the policy as a response to supply disruptions and national security concerns, including the concentration of advanced chip production in East Asia.

Beijing argues that American subsidies and export controls distort competition. Subsidy complaints fall within countervailing measures, a separate trade mechanism that addresses government support. Anti dumping measures address export pricing. The two can be connected when officials examine how a producer's costs and prices were determined.

Whether China will pursue countervailing duties alongside the anti dumping case has not been decided. Its statements indicate that regulators want broad scope to respond to price changes they consider artificial.

Why mature chips matter to China's production plans

Semiconductor manufacturing processes are often described by a node, a rough measure of the size of features etched onto a chip. Mature nodes begin at about 28 nanometers and above, while the most advanced processes include 5 nanometers and below.

Chinese foundries such as SMIC have experience in the 14 to 28 nanometer range and limited capacity at about 7 nanometers. China still faces a gap in the most advanced processors used for leading artificial intelligence training, but mature chips are central to domestic production and account for a large share of demand.

Chinese buyers purchase enormous volumes of analog chips, power management components, microcontrollers and sensors. Those parts serve automobiles, telecommunications base stations, industrial robots and home appliances. The trade case targets this price sensitive part of the market, where American companies have developed extensive product catalogs over decades.

China is pushing for greater self sufficiency. Officials have encouraged public sector computing projects to favor domestic chips, and some guidance calls for local products to account for a majority of chips used in public data centers. Chinese companies are also developing accelerators and networking equipment.

SMIC and Hua Hong are expanding manufacturing capacity at mature nodes. Matching the breadth and reliability of established American analog chip portfolios will take time, however. Having more production capacity and having suitable replacements for every component are different practical tasks for manufacturers.

Companies are also preparing for supply disruptions. Shanghai Fudan Microelectronics, which faces new United States restrictions, said it had increased reserves of wafers and critical materials and diversified its suppliers. Similar preparations have become common as Chinese device manufacturers and chip designers try to reduce their exposure to sudden regulatory changes.

Investors weigh fines, tariffs and changing orders

Nvidia, Texas Instruments and Analog Devices shares fell after Beijing's announcements. Texas Instruments and Analog Devices were among the weakest stocks in early trading, while Nvidia declined as investors considered potential penalties in China alongside continuing American limits on powerful chip exports.

Broader semiconductor indexes surrendered recent gains as traders priced in a greater chance of tariffs and pricing disputes in China. The investigations expose suppliers to different financial risks: Nvidia could face a fine or restrictions on its conduct, while the companies involved in the trade case could face duties on imports.

SAMR can order changes in business practices and impose financial penalties. In previous actions, the regulator has imposed fines reaching 5 percent of a company's sales in China during the preceding year and required commitments to supply customers without discrimination.

Anti dumping duties can match the margin calculated by investigators and remain in place for five years. If provisional measures are introduced, importers could be affected within weeks of a preliminary finding. Chinese automotive and industrial electronics manufacturers would then face potentially higher component costs.

Orders could also move toward domestic suppliers or companies in Europe and Japan. The speed and scale of such changes would depend on the duties and on whether suitable replacement components are available.

Madrid talks bring the timing into focus

United States Treasury Secretary Scott Bessent and Chinese Vice Premier He Lifeng are meeting in Madrid to discuss tariffs, technology controls and security issues involving digital platforms. Previous rounds in Geneva, London and Stockholm produced temporary pauses in tariff increases without resolving deeper disagreements over advanced technology and data.

The chip announcements add another dispute to an agenda that already includes a decision timetable for TikTok and possible tariff expirations. Senior American officials have publicly questioned Beijing's timing.

Bessent, the United States Treasury secretary, said the Nvidia investigation had been raised during the negotiations:

We discussed the poor timing of the Nvidia investigation the day of these talks.

The sequence shows how acquisition rules, export permissions, security reviews and trade complaints have become connected to the same diplomatic contest:

• In 2020, China approved Nvidia's acquisition of Mellanox with conditions intended to protect competition and access for Chinese buyers.
• From 2022 to 2024, imports of the chips targeted in the trade complaint rose 37 percent, while average prices fell 52 percent, according to industry data submitted to Beijing.
• In December, Chinese regulators opened the Nvidia investigation.
• In recent weeks, Washington permitted shipments of certain H20 accelerators, while Chinese agencies raised security concerns about those chips.
• Days before the latest Chinese actions, Washington added 23 Chinese companies to its Entity List.
• By September 16, 2025, Beijing's preliminary Nvidia finding and new anti dumping investigation had added pressure during the Madrid talks.

The negotiations are therefore dealing with more than tariff rates. Decisions over which chips can be sold, who can buy them and what conditions suppliers must meet are also shaping access to technology.

Named analysts offer different assessments

Jordan Klein, a trading desk analyst at Mizuho Securities, dismissed the announcements as negotiating theater rather than an immediate change in the commercial outlook. His assessment was:

Total noise and pure posturing.

Lester Ross, the partner in charge of Wilmer Hale's Beijing office, described a broader Chinese strategy involving both regulation and diplomacy:

This is part of a broader effort by the Chinese government to use the regulatory weapons at its disposal, and diplomatic negotiations, to increase China's access to advanced semiconductors as well as to surpass foreign competitors, ultimately reducing their dependence.

The business consequences depend on how the cases develop. Supply and pricing commitments could affect Nvidia's terms of sale. Duties could make American analog chips more expensive and encourage substitution in vehicles and factories, especially where Chinese, European or Japanese alternatives exist.

A lengthy investigation also creates uncertainty for procurement. Chinese customers choosing equipment must consider whether the supplier's prices, product combinations or access to the market could change before a project is completed.

What companies may have to change

Chinese automotive and industrial manufacturers would need to review their purchasing if provisional duties are imposed on commodity interface chips and gate drivers. Higher input costs could direct more orders toward domestic designs or suppliers outside the United States and speed efforts to qualify local components for vehicles, power systems and factory equipment.

Nvidia's customers face a different issue: whether SAMR ultimately requires only a fine and changes in conduct or seeks remedies affecting how networking products and accelerators are packaged together. Standalone access to Mellanox hardware on standard terms, combined with equal treatment in support, could give Chinese server makers more flexibility.

Restrictions on exclusive software features tied to Nvidia's networking connections could complicate new data center construction and make domestic accelerators more attractive where they are suitable. Those are possible outcomes rather than measures already announced.

Escalation could spread beyond the products now under investigation. Washington could impose further restrictions on chip design software, advanced packaging equipment or services used in powerful computing systems. Beijing could investigate additional component categories or pursue countervailing duty complaints over alleged subsidies.

Decisions in Madrid will help determine whether the investigations remain separate disputes or become part of a wider exchange of measures affecting prices and sourcing. For manufacturers, practical preparations include checking exposure to the tariff codes under review, arranging alternative analog chip suppliers and reviewing contracts that allow new duties to be passed through to customers.

Importers pausing orders while waiting for clarity could create temporary shortages of particular gate drivers and interface chips. Broader duties and a longer Nvidia investigation would give Chinese buyers more reason to commit to domestic parts and reduce their dependence on American suppliers.

Key Points

• China's competition regulator said a preliminary investigation found Nvidia broke commitments linked to its 2020 Mellanox acquisition. The inquiry continues.
• The Commerce Ministry opened an anti dumping case involving commodity interface chips and gate drivers from Texas Instruments, Analog Devices, Broadcom and ON Semiconductor.
• Industry figures submitted to Beijing allege imports rose 37 percent from 2022 to 2024 while average prices fell 52 percent, with dumping margins reaching 300 percent.
• The complaint says chips originating in the United States hold 41 percent of China's market for the products under investigation.
• The actions coincide with Madrid trade talks and follow Washington's addition of 23 Chinese companies to its Entity List.
• Potential outcomes include changes to Nvidia's business practices, financial penalties and chip import duties typically lasting five years.
• Nvidia, Texas Instruments and Analog Devices shares fell as investors assessed the risks.
• Chinese carmakers, factories and electronics producers could face higher costs and pressure to change suppliers if duties are imposed.