NVIDIA Corporation

Microsoft Corporation

Alphabet Inc.

U.S. stock markets ended a chaotic week with stocks reversing upward after a sell-off in the AI sector on Thursday. About 450 securities from the S&amp;P 500 index rose on Friday, supported by strengthened hopes that the U.S. Federal Reserve may still lower its key rate in December. At the same time, all three indices remained in the negative at the end of the week, and bitcoin reached its lowest value since April.

Wall Street believed in Fed rate cut: stocks ended a dramatic week with gains

Alphabet, which owns Google, on Friday surpassed Microsoft in capitalization and entered the top 3 most expensive companies in the world after Nvidia and Apple. Alphabet shares rose 3.8% in trading on Nov. 21, bringing its market value to $3.6 trillion, CNBC <a href="https://www.cnbc.com/quotes/GOOGL">shows </a>. Microsoft shares, meanwhile, fell 1.1%, with its <a href="https://www.cnbc.com/quotes/MSFT">capitalization </a>just above $3.5 trillion. If this dynamic continues, the Nov. 21 session will be the first time since Aug. 30, 2018, that Alphabet ends trading with a capitalization higher than Microsoft's, according to Dow Jones Market Data, Barron's <a href="https://www.barrons.com/articles/google-stock-price-market-cap-value-microsoft-alphabet-624b6fe5">notes</a>.

Alphabet has surpassed Microsoft in terms of capitalization and entered the top three most expensive companies

Tuesday, November 18 saw <a href="https://blog.google/products/gemini/gemini-3/">the</a> long-awaited launch of Gemini 3, Google's new version of AI, which has generated quite a bit of hype and rumors over the past month. Apparently, the rollout is going well and user feedback is mostly positive. That gave a boost to shares of parent company Alphabet, which were already up when it was revealed that they were <a href="https://www.cnbc.com/2025/11/14/warren-buffetts-berkshire-hathaway-reveals-new-position-in-alphabet.html">bought by</a> legendary investor Warren Buffett's Berkshire Hathaway fund in the third quarter. There is an interesting twist in the frenzied AI race: Gemini is clearly challenging the previously undisputed leader ChatGPT from OpenAI.

Okay, boomer: why Google is back in vogue

Berkshire Hathaway Inc.

Amazon.com, Inc.

Tesla, Inc.

The reshuffle was prompted by the rapid rise in Alphabet's stock, driven by a number of factors

The founder of Google has entered the top 3 richest billionaires in the world. Who has he displaced?

Alphabet securities rose by almost 7% in trading on November 19

Alphabet's stock has hit an all-time high. What does Wall Street like about its new AI model?

Gemini 3 release could be a new catalyst for Alphabet stock growth

Google revealed a new AI model amid growing competition with OpenAI. What does it mean?

Loop Capital upgraded its rating on shares of Google's holding company, Alphabet, and now advises buying them. The upgrade follows Warren Buffett's Berkshire Hathaway's reported purchase of a stake in Alphabet and comes amid a steady decline in technology stocks due to investor concerns about the overvaluation of AI companies.

'Waves of AI enthusiasm': Loop Capital advises buying Alphabet shares despite risks

One in two global fund managers sees an AI market bubble as the most dangerous risk

Google CEO: if the AI bubble bursts, everyone will suffer

The likely imminent release of Gemini 3.0 boosts investors' hopes for Google's future breakthroughs

Buffett has fueled the rise in Alphabet's stock. They may have a new reason for a record high

Shares of Google's holding company, Alphabet, soared 5.2% on the premarket on November 17 after Warren Buffett's Berkshire Hathaway disclosed a stake in the tech giant. Alphabet shares have gained 46% since the start of the year, comfortably outperforming the main U.S. index, the S&amp;P 500, which added 14.5%.

Alphabet shares jump after Berkshire Hathaway stake disclosure

Zillow Group, Inc.

Synopsys, Inc.

In the third quarter, AKR Invest stepped up its bets on bioinnovation, cryptoinfrastructure and artificial intelligence

Alphabet, Robinhood and Baidu: how Cathie Wood's portfolio changed in the third quarter

Shares of Alphabet, which owns Google, immediately entered the top 10 in terms of share in Berkshire's portfolio