Key Highlights

● Nvidia (NVDA) closed at $228.86 on Monday, up from $225.07, while most other major chip stocks fell.

● Its board authorized an additional $150 billion in share buybacks, giving investors a reason to look past AI spending worries.

● Reports that OpenAI paused Training of some frontier models hit Qualcomm, Arm, Intel, AMD, Micron and Marvell.

● Nvidia also launched its Open Agent Safety Platform, with partners including Anthropic, Microsoft, Palantir, Salesforce, Palo Alto Networks and JPMorgan.

Nvidia (NASDAQ:NVDA) rose on Monday, September 28, on a day when almost every other major chip stock fell. The AI chip leader closed at $228.86 against $225.07 on Friday, a gain of about 1.7%, finishing firmly in the green while the Nasdaq Composite dropped 248.34 points to 26,820.38.

A $150 Billion Vote of Confidence

The catalyst was Capital return on a massive scale. Nvidia's board authorized an additional $150 billion in share buybacks. A buyback means a company uses its own cash to purchase its shares, which reduces the number of shares outstanding and can support earnings per share.

Chief executive Jensen Huang said the company's cash generation gives it the capacity to invest in the technologies that advance the AI transformation and to return capital to shareholders.

The OpenAI Pause Hit Everyone Else

The rest of the semiconductor sector had a rough day. Over the weekend, reports said OpenAI had paused training of some frontier models. The reports raised questions about how quickly AI developers will keep absorbing new computing power, and chip stocks sold off. Qualcomm (NASDAQ:QCOM) fell more than 7%, Arm nearly 9%, and Intel (NASDAQ:INTC), AMD (NASDAQ:AMD), Micron (NASDAQ:MU) and Marvell (NASDAQ:MRVL) all slid. Nvidia's buyback news gave investors a reason to look past those concerns, at least for a day.

A Safety Push, Too

Nvidia also launched the Nvidia Open Agent Safety Platform, a set of guardrails for AI agents that includes tools called OpenShell and Nvidia Sentry. Partners include Anthropic, Microsoft (NASDAQ:MSFT), Palantir (NASDAQ:PLTR), Salesforce (NYSE:CRM), Palo Alto Networks (NASDAQ:PANW) and JPMorgan (NYSE:JPM). Huang said AI's potential will only be realized if the industry solves AI safety. Coming right after the OpenAI pause, the timing drew attention.

The wider market still struggled. Treasury yields surged to multi-year highs, with the 10-year at its highest since 2007 and the 30-year at its highest since 2004. When safe Government Bonds pay more, stocks that trade on future earnings usually feel it first. The S&P 500 fell 59.72 points, or 0.77%, to 7,683.69, while the Dow Jones Industrial Average lost 347.11 points to 51,481.51 and the Nasdaq Composite dropped 248.34 points to 26,820.38.

Micron's Report Is the Next Read on AI Hardware

The next big test for AI hardware comes on Wednesday, when Micron reports earnings after the close, giving a fresh read on memory Demand from AI data centers.

Key releases ahead include Tuesday's JOLTS Job Openings and consumer confidence, Wednesday's PCE inflation, Thursday's ISM Manufacturing and Friday's September employment report. The Federal Reserve raised rates on September 16 to a range of 3.75% to 4.00%, and futures suggest the next hike could come as soon as October. Yields will remain a key swing Factor for Nvidia and the whole chip group.