Key Highlights

● Nvidia finished roughly flat on Tuesday, September 29, 2026, trading near $230.30 at midday compared with Monday's close of $228.86.

● On September 28, Nvidia announced a $150 billion share buyback authorization, described as the largest in U.S. history.

● Nvidia launched an Open Agent Safety Platform, and Rosenblatt reiterated a Buy rating with a $390 price target.

● Chip stocks rallied as the Nasdaq-100 edged higher to 30,339.33 while the S&P 500 and Dow finished lower.

A day after announcing what was described as the largest buyback in U.S. history, NVIDIA Corporation (NASDAQ:NVDA) was still the stock everyone was talking about. On Tuesday, September 29, 2026, the AI chip giant finished roughly flat, with sources differing on whether it ended slightly higher or slightly lower. The stock traded near $230.30 at midday, above Monday's close of $228.86.

A $150 Billion Statement

On Monday, September 28, Nvidia announced a $150 billion share buyback authorization. A buyback of that size tells investors the company generates so much cash from its AI chip business that it can return a huge sum to shareholders while still investing in growth. Buybacks also reduce the number of shares outstanding over time, which can lift earnings per share. Tuesday's action showed investors had largely absorbed the news.

More News to Digest

Nvidia also launched an Open Agent Safety Platform, a tool aimed at managing the risks of AI agents. 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. Rosenblatt reiterated its Buy rating with a $390 price target.

AI in Every Headline

A leaked Anthropic IPO prospectus, as reported, pointed to a valuation target above $2 trillion and $518 billion of planned compute and infrastructure obligations, spending that would largely flow to chipmakers. Advanced Micro Devices (NASDAQ:AMD) agreed to buy World Labs for $8.2 billion in stock, and OpenAI reportedly delayed a model release over security concerns. Chip stocks broadly rallied, with Applied Materials, Arm and Marvell posting solid gains.

A Soft Session Overall

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. Long-term Treasury yields pressured stocks through the session, with the 30-year yield at its highest since 2002.

Ahead

GDP and August PCE inflation data arrive on Wednesday, September 30, and the September jobs report follows on Friday, October 2, with a consensus of about 95,000 jobs. The Federal Reserve meets on October 27 and 28.