Why Artificial Intelligence Stocks Taiwan Semiconductor, Arista Networks, and Vertiv Holdings All Plunged Today

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Shares of artificial intelligence (AI) and AI-adjacent stocks such as Taiwan Semiconductor Manufacturing (NYSE: TSM), Arista Networks (NYSE: ANET), and Vertiv Holdings (NYSE: VRT) were all down big on Monday, falling 4.7%, 8.3%, and 10.5%, respectively, as of 3:52 p.m. ET.

All of these stocks are tied to the artificial intelligence trade, and their moves are likely related to Nvidia, which was down around 9.8% at the same time.

The large decline is likely due to a mix of broader economic factors around tomorrow's tariffs and their effects, industry-specific news items, and perhaps some company-specific news in the case of TSMC.

Tariffs, China shipments, and $100 billion in TSMC investments

Front and center in today's sell-off was the tariff threat, specifically on Canada, Mexico, and China. While these tariffs had previously been announced, some investors may have hoped for delays or cancellations. However, President Donald Trump confirmed the tariffs were set to go into effect tomorrow.

The biggest fears over tariffs is that they will cause stagflation, which is a bad combination of slowing economic growth along with higher prices. The fears were augmented today by the ISM Manufacturing Survey from February, which was also released earlier today.

In that survey, the index came in at 50.3, which was lower than the 50.9 reading in January and lower than the 50.8 that economists expected. While the miss on the overall index was a bit worrisome, some of the numbers underneath were even more so. The prices paid index jumped to 62.4 from 55.8 and was much higher than the expected 54.9, indicating inflationary pressures. Meanwhile, the manufacturing employment index fell to 47.6, from 50.3.

The readings basically point to a stagflationary scenario, with falling employment and orders, but also higher prices. Needless to say, this report affected all economically sensitive stocks, which includes semiconductors and infrastructure stocks.

A person appears worried while looking at a smartphone.
Stagflationary fears permeated the market today. Image source: Getty Images.

In addition, there have been some renewed fears over the AI trade over the past few weeks. While Nvidia still reported strong numbers and guidance last week, the market was perhaps hoping for more reassurance. TSMC makes Nvidia's chips, Vertiv builds a lot of AI data centers around the world, and Arista makes the networking gear that many AI data centers use. So, these three stocks are all tied to Nvidia, in some way.

Already present nerves over the sustainability of Nvidia's growth and the return on AI spend saw another headwind on Sunday. Yesterday, The Wall Street Journal ran a story on how China has apparently been able to procure Nvidia chips by getting around recent U.S. export controls. The story details how a sophisticated network of underground brokers reroutes shipments of the chips from Singapore to China through other shell companies in Malaysia, Vietnam, and Taiwan.