CNBC Daily Open: Wall Street high on AI euphoria

This report is from today's CNBC Daily Open, our international markets newsletter. CNBC Daily Open brings investors up to speed on everything they need to know, no matter where they are. Like what you see? You can subscribe  here .

Markets positive
Wall Street hit another record on Friday as markets wrapped the week on a positive note with help from Nvidia's bumper earnings. The S&P 500 gained 0.03% hitting fresh highs, while the Dow also closed at an all-time high. The Nasdaq Composite lost 0.28% but touched a fresh 52-week high in the session.

Pushing AI phones
Smartphone players like Samsung want to jump on the artificial intelligence frenzy to boost sales of their devices. Smartphone makers plan to talk up the tech at the Mobile World Congress, which kicks off on Monday in Barcelona.

Lenovo laptop prototype
Chinese tech giant Lenovo showed off a prototype of a laptop that has a see-through screen, using a technology similar to augmented reality in some senses. Since the laptop is a concept product, Lenovo has no plans to sell the device.

Berkshire Hathaway earnings jump
Berkshire Hathaway operating earnings surged 28% in the fourth quarter, while its cash pile soared to record levels. For the full year, operating earnings rose to $37.35 billion, up 17% from $30.85 billion in the previous year.

[Pro] China AI stocks surge
Even if China's broader market recovery remains muted, Chinese artificial intelligence stocks are rising. Analysts are bullish on tech giant Baidu — which Morgan Stanley called the "best AI play in China Internet." The company is set to release earnings this week.

Al euphoria took over Wall Street last week, thanks to Nvidia. 

The chipmaker's market cap briefly topped $2 trillion on Friday, after posting