Key Highlights

● Nvidia finished roughly flat on September 29, 2026, with sources differing on whether it ended slightly up or slightly down.

● The chipmaker announced a $150 billion share buyback on Monday, September 28, called the largest in U.S. history.

● Rosenblatt reiterated a Buy rating on Nvidia with a $390 price target, well above where the stock traded.

● Nvidia is a Dow member, and the index fell 131.59 points to 51,349.92 as chip stocks rose.

NVIDIA Corporation (NASDAQ:NVDA) finished Tuesday, September 29, 2026, roughly flat. Sources differed on whether the stock closed slightly up or slightly down, but the day's move was modest next to the size of the news that preceded it. The Dow Jones Industrial Average, which includes Nvidia, fell 131.59 points to 51,349.92.

A $150 Billion Buyback, Absorbed

On Monday, September 28, Nvidia announced a $150 billion share buyback authorization, called the largest in U.S. history. A buyback lets a company purchase its own shares on the open market, shrinking the share count over time and returning cash to shareholders. Tuesday brought follow-through, but not fireworks. The stock traded near $230.30 at midday, and technology shares surrendered early gains as the session went on.

Analyst and Product News

Rosenblatt reiterated its Buy rating on Nvidia with a $390 price target. Nvidia also launched an Open Agent Safety Platform, aimed at managing risks from AI agents, software that can take actions on its own. Justin Boitano, Nvidia's vice president of enterprise AI, said traditional model-level protections are no longer sufficient to manage the capabilities of AI agents.

A Day Heavy With AI Headlines

A leaked Anthropic IPO prospectus, as reported, showed a valuation target above $2 trillion and $518 billion of planned compute and infrastructure obligations, a figure that underlines how much hardware the big model developers plan to buy. Advanced Micro Devices (NASDAQ:AMD) agreed to buy World Labs for $8.2 billion in stock.

Chips Shine, Market Slips

Semiconductors were one of the day's bright spots, with chip ETFs rising and the U.S. chip index higher. Broadcom and Applied Materials were among the gainers. The Nasdaq-100 edged higher to 30,339.33 on the chip rally, even as the S&P 500 slipped 12.85 points to 7,670.84 and the Dow Jones Industrial Average fell 131.59 points to 51,349.92. The Nasdaq Composite ended nearly flat at 26,797.54.

Rates and What to Watch

Long-term Treasury yields pressured stocks through the session, with the 30-year yield at its highest since 2002. The Conference Board's index of consumer confidence slid to 81.9, a 12-year low, from 88.6 the month before. Chicago Fed President Austan Goolsbee said expectations of productivity gains from AI in the future create a high danger of overheating now. For Nvidia, investors will watch how quickly the company begins executing its new buyback and whether AI customers keep expanding their spending plans.