The U.S. market is top-heavy, with Nvidia occupying a bigger weight than any company in modern history. Risks abound, our columnist says.

However, Huang's extensive lobbying paid off. Nvidia agreed to a 15% revenue-sharing agreement with the U.S. government, which allowed the company to resume sales of the H20 chip to China. While the deal could weigh on Nvidia's margins, it marks the continuation of a potentially lucrative opportunity, but there's more good news.

The nuance here is that the dot-com bubble was defined by abundance — too many companies, too much capital, and too many competing investment ideas. Meanwhile AI, at least so far, offers a story of scarcity built almost entirely on a single company.

Live Updates Live Coverage Updates appear automatically as they are published. Friday Wrap-up 4:10 pm The Vanguard S&P 500 ETF closed at 593.22 Friday, up 1.5% for the day but only 0.3% for the week.

Nvidia's stock price slipped Thursday, but a wave of analyst upgrades highlights confidence in its AI growth prospects.

When Nvidia, the chip producer, reports earnings next week, investors expect the S&P 500 to have a bigger reaction than when the Fed chair delivers a big speech on Friday.

A wobble in U.S. technology shares has raised the stakes for Nvidia Corp's quarterly results on Wednesday, with earnings from the semiconductor giant posing a crucial test for the scorching AI trade.

U.S. stock market futures were mixed Friday ahead of a pivotal speech from Fed Chair Jerome Powell in which the central bank chief will set out his views on where to take interest rates. Dow Jones Industrial Average futures rose 60 points,

Nvidia Corporation's $4T valuation may be unsustainable, with parallels to past bubbles, AI hype concerns, and China's chip sales risks. Click for my NVDA update.

Two hedge fund managers with a track record for market beating returns sold Nvidia and bought Palantir in the second quarter.