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Cathie Wood has built her reputation by making bold, forward-looking bets. Her latest move at Ark Invest -- buying into Alibaba (BABA -8.60%) for the first time in four years -- has reignited U.S. investors' interest in one of China's most followed companies.

Palantir Technologies (PLTR -5.39%) has undoubtedly been one of the big winners in artificial intelligence (AI). Its valuation has skyrocketed by more than 2,790% since the start of 2023.

Billionaire David Tepper bought shares of Nvidia hand over fist in the second quarter of 2025. His Appaloosa Management hedge fund increased its stake in the stock by a whopping 483%.

There's no denying Nvidia (NVDA -4.84%) has earned its place as the world's biggest publicly traded company. Its technology is the heart and soul of most of the planet's artificial intelligence (AI) platforms, and AI itself is working to become one of the most revolutionary inventions of all time.

Neben der Elektroautoindustrie überzeugt der chinesische Hightech-Sektor immer mehr in Bereichen wie KI und Chips. Auch dank des US-Handelsstreits.

The selloff underscored renewed investor anxiety over escalating U.S.-China tensions.

Concerns that an AI bubble is forming have mounted in recent days, following warnings from the Bank of England and the International Monetary Fund.

China's e-commerce giant is now also an AI and cloud computing play. But this new role has risks that Wall Street is keenly aware of.