AI Infrastructure Leader NVIDIA Surges as Institutional Buying Intensifies in March 2026

NVIDIA (NVDA) emerged as the top-performing AI stock in March 2026, posting a 18% gain on the strength of sustained institutional accumulation. Sector analysts note that proprietary tracking of insider and institutional trades shows a net inflow of $4.7 billion into NVDA shares during the month, the highest level since Q1 2024. The surge follows the company’s fiscal Q2 2026 earnings report, which revealed data center revenue reached $22.3 billion—up 67% from the same quarter last year. This growth was fueled by record demand for its Hopper and Blackwell GPU architectures, with Blackwell-based systems accounting for 41% of total data center shipments. The company also reported a 24% increase in gross margin, reaching 76.8%, underscoring pricing power and supply chain efficiency. Market analysts interpret the institutional buying as a signal of confidence in long-term AI infrastructure demand. The stock’s price-to-earnings ratio of 48.2x, while elevated, reflects investor expectations of continued double-digit revenue expansion through 2027. Major asset managers, including BlackRock and Vanguard, increased their holdings in NVDA by an average of 12% over the month, according to filings. The momentum has rippled through the broader semiconductor and cloud infrastructure sectors. Competitors like AMD (AMD) and ASML (ASML) saw their shares rise 7% and 5.3%, respectively, on heightened investor interest in AI supply chain exposure. Meanwhile, cloud providers such as Microsoft (MSFT) and Amazon (AMZN) reported stronger-than-expected AI service revenue, further validating the ecosystem’s expansion.