The Dow Jones Industrial Average was down, while the S&P 500 Index and Nasdaq Composite were roughly flat in late-morning trading Monday, as oil prices rose after Iranian state media disclosed that Iran would halt messages with the US over Israel's military operations in Lebanon.

In company news, Nvidia (NVDA) said Monday it has launched RTX Spark, a new AI chip that will feature in Microsoft (MSFT) Windows laptops and desktop personal computers. The chip features an Nvidia Blackwell RTX graphics processing unit, 1 petaflop of AI compute and 128gb of unified memory, Nvidia said. RTX Spark will power its Windows laptops, including Microsoft Surface, and those of its PC partners ASUS, Dell (DELL), HP (HPQ), Lenovo and MSI, Microsoft said in a blogpost. Nvidia shares were up 3.9%, while those of Microsoft, Dell and HP were up 2.0%, 8.5% and 7.2%, respectively.

People Inc. said Monday it has submitted a non-binding proposal to acquire all outstanding MGM Resorts International (MGM) shares it doesn't already own for $48.30 per share in cash. The proposal represents a 24.1% premium to the volume-weighted average price of MGM common stock for the 30 trading days ending on May 29, People said. MGM shares were up 16.5%.

Taylor Morrison Home (TMHC) has agreed to be acquired by Berkshire Hathaway (BRK.A, BRK.B) for $6.8 billion in cash and a total enterprise value of about $8.5 billion, the companies said Sunday. Berkshire will pay $72.50 per share, a 24% premium to Taylor Morrison's latest closing price of $58.50 on May 29, the companies said. The deal is expected to close in H2, at which point Taylor Morrison will continue to be managed by its existing management team, the companies said. Taylor Morrison shares were up 22.6%, while Berkshire's Class A and Class B shares were down 0.7% and 0.8%, respectively.

Constellation Energy (CEG) has priced an underwritten secondary offering of 11 million shares at $281 apiece, the company said Monday. Underwriters have a 30-day option to buy an extra 1.35 million shares, and Constellation said it will repurchase 2 million shares from the underwriters at the offering price under its existing buyback program. Constellation shares were down 5.8%.

Salesforce (CRM) said Monday it will invest $2 billion in France through 2030, including the launch of an AI Innovation Hub in Paris for developing, testing and deploying AI applications. Salesforce shares were up 10.2%.

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