US markets, Monday 28 September 2026

Citi and Coinbase form a partnership to facilitate stablecoin payment services for institutional clients. COIN · 191.65 → 195.61 · Volume 36.1K shares in 10 min · 10.2× normal

Nvidia increases its share repurchase authorization by $150 billion NVDA · 224.58 → 228.69 · Volume 822.2K shares in 10 min · 8.8× normal

Meta appoints CJ Desai, MongoDB's CEO, to lead its operations, causing MongoDB shares to decline. META · 746.31 → 739.49 · Volume 75.7K shares in 10 min · 6.0× normal

Nvidia appends a record US$150 billion to its stock buyback. Nvidia's board has approved an extra US$150 billion for the company's share repurchase program. That raises the total still available for buybacks to US$235 billion. The company stated on September 28 that it is the largest increase to a buyback authorization in history, and it anticipates to spend the full amount by the end of fiscal 2028. NVDA · 231.01 → 228.96 · Volume 4.2M shares in 10 min · 2.7× normal

Flashlight Capital, an activist investor, urges Samsung (005930 KS) to auction its stake in S-1 Corp (012750 KS). 005930 · 277,750.00 → 276,000.00

SK Hynix (000660 KS) has initiated construction work for its semiconductor fabrication plant in Japan's Tohoku region. 000660 · 1,770,000.00 → 1,780,000.00

Nvidia CEO Huang describes the new software as a browser designed for agents NVDA · 227.69 → 228.70 · Volume 378.4K shares in 10 min · 4.3× normal

NVIDIA developed Openshell and sentry to control AI agents' behavior. NVDA · 223.18 → 224.00 · Volume 19.8K shares in 10 min · 1.8× normal

Nvidia and OpenAI received invitations to attend the Trump-Johnson meeting. NVDA · 230.39 → 229.67 · Volume 1.4M shares in 10 min · 1.0× normal

Nvidia CEO Huang will attend the White House meeting scheduled for Tuesday. NVDA · 229.82 → 229.11 · Volume 1.9M shares in 10 min · 1.6× normal

Nissan (7203 JT) aims to localize 80% of its US manufacturing by the year 2030 7203 · 3,006.00 → 3,015.00

Meta and Amazon face inquiries regarding tax incentives linked to their AI investment activities. META · 720.24 → 718.15 · Volume 346.4K shares in 10 min · 1.6× normal

AMD consents to buY Fei-Fei Li’s World Labs AI startup for $8.2b. $AMD. AMD to acquire World Labs to advance the future of AI computing | AMD CEO Lisa Su: World Labs acquisition will strengthen the company's hardware roadmap | Lisa Su: Goal of the acquisition is to build "better AI" AMD · 608.31 → 609.70 · Volume 31.8K shares in 10 min

AMD is purchasing World Labs, an AI company led by Fei-Fei Li, in a transaction valued at $8.2 billion. AMD · 607.00 → 608.32 · Volume 30.8K shares in 10 min