Berkshire Hathaway shares have climbed to an all-time high, erasing all the ground lost after Warren Buffett's surprise 2025 announcement that he would step down as chief executive. The recovery took almost 18 months and marks the stock's strongest run since the leadership transition began.

Nvidia's expanding role as a financier of artificial-intelligence infrastructure is drawing fresh scrutiny after shares of several 'neocloud' companies that rent out its chips fell sharply this week. Analysts said the slide has raised questions about whether the AI data-center boom can generate enough revenue to cover its debt-fueled growth.

Meta chief executive Mark Zuckerberg has reached an arrangement with the company to help cover the cost of a proposed California wealth tax targeting billionaires. Zuckerberg had previously said he would consider leaving the state if the levy took effect.

Apple shares are trading near record highs and closing in on Nvidia's market capitalization, putting the iPhone maker on track to reclaim the title of world's most valuable company. Upcoming quarterly earnings could be the catalyst that pushes Apple's valuation past its AI-chip rival.

Qatar has struck a deal to purchase liquefied natural gas from US exporters, the latest sign of how the Iran war is reshaping global energy markets. Security concerns around the Strait of Hormuz are pushing buyers toward alternative supply routes, benefiting American LNG producers.

The White House will ease tariffs on a range of Canadian goods, including certain machinery, from October 30, while raising duties on others such as carpets. The adjustment comes as trade friction between Washington and Ottawa continues ahead of November's midterm elections.

The Dow Jones Industrial Average fell 500 points on Friday as tensions in the Middle East intensified. Selling broadened beyond technology stocks into a wider market decline.

The U.S. Justice Department has sued to block Alaska from certifying its Senate race if the Republican candidate narrowly loses. The contest is one of several nationwide that could decide whether Republicans keep their slim Senate majority.

U.S. Treasury yields posted their sharpest one-day drop since the 2023 banking crisis as investors rushed into government bonds amid a broader tech-stock sell-off. Analysts described the move as a flight to safety rather than a signal of imminent recession.

U.S. President Donald Trump has asked Elon Musk to reverse a slowdown of SpaceX's Starlink satellite service that Musk had ordered for Ukraine, the Wall Street Journal reported. Musk, a vocal critic of Ukrainian President Volodymyr Zelenskyy, is said to have throttled the service amid tensions over the war.

OpenAI is close to finalizing a funding round of up to $30 billion at a $1.25 trillion valuation, led by investors from the United Arab Emirates. Sources familiar with the matter told CNBC the round is meant as a bridge to the company's planned 2027 IPO.

The Nasdaq fell more than 2% on Thursday, its worst day since June, as Meta and Tesla led declines amid AI spending concerns and rising oil prices. Treasury yields also dropped sharply as investors sought safety.

Initial filings for US unemployment insurance slipped to a seasonally adjusted 194,000, among the lowest readings since the 1960s. The data points to a continuing trend of low layoffs across the American labor market.

Meta Platforms shares fell 6% after third-quarter spending on artificial intelligence infrastructure pushed the company's free cash flow negative for the first time in years. Prices for Meta's five-year credit default swaps climbed to record highs as investors signaled growing concern over the company's debt risk.

Barclays said it will cut 5,000 jobs, about 5% of its workforce, as the British bank increases its reliance on artificial intelligence. The lender said AI tools are taking over tasks previously handled by staff across its operations.

Norway's sovereign wealth fund, the world's largest, posted a $30 billion loss in the third quarter after a bond market slump hit its holdings. Norges Bank Investment Management, which runs the roughly $2.3 trillion fund, said returns on its bond portfolio turned negative as yields rose.

Shares of AI cloud-computing company CoreWeave have fallen 29% in October. CNBC reports that the spreads on the company's credit default swaps are also widening, meaning investors are pricing in higher risk of default on its debt. The slide renews questions about the financing costs behind massive AI infrastructure spending.

Meta has been fined $25 billion over allegations that it lied to users about how it handled their personal data. BBC Business describes the penalty as the largest yet imposed on Facebook's parent company, surpassing an earlier $18 billion privacy settlement Meta reached with the state of California. Meta has not yet issued a public response.

Intel has installed the first major structural truss at its long-delayed chip factory in Ohio, marking a visible construction milestone. The company has not yet announced a major outside customer for the plant, which is running at least five years behind schedule.

eBay will lay off about 1,000 employees, roughly 9% of its workforce, in its second round of job cuts this year. The e-commerce company said the move is meant to sharpen its focus on top strategic priorities.