---
title: "March 3rd, Top 20 US Stock Trading Volume: NVIDIA Invests $4 Billion in Optical Communication Industry"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/277523652.md"
description: "NVIDIA ranks first in U.S. stock trading volume, with a stock price increase of 2.93% and a transaction volume of $37.38 billion. As a strategic investment, NVIDIA will invest $2 billion each in optical communication companies Coherent and Lumentum to support the construction of artificial intelligence infrastructure. Tesla and Microsoft rank second and third, respectively, with Tesla's stock price increasing by 0.20% and a transaction volume of $21.769 billion, while Microsoft's stock price rose by 1.48% with a transaction volume of $12.931 billion. SanDisk's stock price fell by 2.56% with a transaction volume of $10.779 billion, due to a short report released by Citron Research, which pointed out its overvaluation"
datetime: "2026-03-02T21:47:05.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/277523652.md)
  - [en](https://longbridge.com/en/news/277523652.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/277523652.md)
---

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# March 3rd, Top 20 US Stock Trading Volume: NVIDIA Invests $4 Billion in Optical Communication Industry

On Monday, the most traded stock in the U.S. market, NVIDIA, rose by 2.93%, with a trading volume of $37.38 billion. As part of its strategic investment, NVIDIA will invest a total of $4 billion in optical communication companies Coherent and Lumentum to strengthen its R&D pipeline and supply chain, supporting the construction of large-scale artificial intelligence infrastructure. Both companies are dedicated to the research and development of optical technology in the field of optical communication.

The American chip giant announced on Monday that it will invest $2 billion in each of the two companies.

The second most traded stock, Tesla, rose by 0.20%, with a trading volume of $21.769 billion. The Italian Minister of Transport stated that Tesla's new car registrations in Italy fell by 6.9% year-on-year in February.

The third most traded stock, Microsoft, rose by 1.48%, with a trading volume of $12.931 billion. On February 27, OpenAI announced the completion of a new round of financing of approximately $110 billion, with a pre-investment valuation of $730 billion.

This follows last year's $41 billion financing, marking another record fundraising for OpenAI and the largest financing for a private tech company to date.

This round of financing is led by strategic investors, with Amazon investing $50 billion, and SoftBank and NVIDIA each investing $30 billion.

The sixth most traded stock, SanDisk, fell by 2.56%, with a trading volume of $10.779 billion. Citron Research released a short report on February 24, announcing the establishment of a short position in SanDisk, pointing out that SanDisk's current valuation is overestimated and that the high-margin phase of the memory chip industry is temporary.

The report stated that the tight supply of memory is only a temporary phenomenon, and once major manufacturers restore yield and release capacity, the supply-demand pattern may reverse. NAND flash memory, as SanDisk's main product, is essentially a commodity, with prices and profitability dominated by supply and demand cycles. The industry has historically experienced cycles of "boom—oversupply—collapse," with rapid reversals following each high-margin phase.

Unlike NVIDIA's GPU ecosystem, NAND flash products are highly interchangeable, and competition among manufacturers revolves around cost and scale. Additionally, Western Digital has recently significantly reduced its holdings in SanDisk at a price about 25% lower than the current market price.

Citron believes this is an early judgment by insiders on the peak of the cycle. Before the short report was released, SanDisk's stock price was at a high, and after the report was published, the stock price came under pressure, but the impact seemed to dissipate after two trading days. The CEO of SanDisk emphasized during the earnings call that the demand for storage driven by AI represents a "structural rather than cyclical change," which will reduce the cyclical volatility of the NAND business.

The eighth most traded stock, Palantir, rose by 5.82%, with a trading volume of $10.436 billion. On February 28, the U.S. and Israel launched a large-scale attack on Iran, with media reports stating that the U.S. military utilized technology company Anthropic to conduct a large-scale airstrike on Iran. Sources confirmed that command centers, including the U.S. Central Command, are using Anthropic's Claude AI tool for intelligence assessment, target identification, and simulating combat scenarios, highlighting the extent of AI tools' involvement in military operations It is reported that this is not the first time the United States has used Anthropic's AI technology in significant military operations. Previous reports indicated that the Claude model was used to assist in the capture of former Venezuelan President Maduro. Claude was able to provide support for military operations against Maduro due to Anthropic's collaboration with data analytics company Palantir, whose platform is widely used by the Department of Defense and law enforcement agencies.

Meta Platforms ranked 14th, rising 0.83% with a trading volume of $6.344 billion. In recent weeks, Alphabet, Amazon, Microsoft, and Meta have all released their latest financial reports, indicating that demand for NVIDIA chips is higher than ever based on their capital expenditure forecasts. These four companies are expected to spend nearly $700 billion this year to build AI data centers, a significant portion of which will be allocated to procuring NVIDIA's graphics processors.

Berkshire Hathaway Class B shares ranked 15th, falling 4.91% with a trading volume of $5.354 billion. On February 28, Berkshire Hathaway announced its full-year financial report for 2025, achieving revenue of $371.444 billion, compared to $371.433 billion in the same period last year; the net profit attributable to shareholders was $66.968 billion, a significant decline from $88.995 billion in 2024.

According to public information, this is the last annual financial report during "Oracle of Omaha" Buffett's tenure as CEO of Berkshire. During his 60 years in charge, he has generated over 60,000 times total returns for investors, with a compound annual growth rate of 19.7% in per-share market value.

The profit decline was mainly affected by fluctuations in investment income. According to accounting standards, Berkshire must account for unrealized gains and losses from its large investment portfolio in net profit, leading to significant performance impacts from short-term market fluctuations.

Lumentum Holdings ranked 16th, rising 11.75% with a trading volume of $5.149 billion. On March 2, NVIDIA announced a strategic partnership with the company to jointly develop advanced optical technologies. This non-exclusive agreement includes NVIDIA's multi-billion dollar procurement commitments and future capacity rights for advanced laser components. Additionally, NVIDIA will invest $2 billion in Lumentum to support its R&D, future capacity, and operations, aiding the company in building a new wafer fab in the U.S. to expand its manufacturing capabilities.

ExxonMobil ranked 17th, rising 1.13% with a trading volume of $4.863 billion. Citigroup raised ExxonMobil's target price from $118 to $150.

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