Billionaire Ken Griffin Has Been Quietly Selling Microsoft and Buying This Chip Stock Instead. (Hint: It's not Nvidia.)

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A good way to help develop your investment prowess is by looking at the actions of acclaimed money managers. Sounds easy, but how exactly can you do that?

Well, luckily, the Securities and Exchange Commission requires institutional investors managing over $100 million to file a form 13F once per quarter. You can think of a 13F as an itemized receipt, breaking down each trade Wall Street's brightest minds conducted during the quarter.

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One investor I enjoy following is Ken Griffin, the billionaire co-founder of the Citadel investment firm. According to its current 13F, Citadel has been steadily reducing its position in Microsoft (NASDAQ: MSFT) while adding shares in chip manufacturing powerhouse Taiwan Semiconductor Manufacturing (NYSE: TSM).

Below, I'll break down what could be influencing these decisions and whether I agree with Griffin's calls.

Why sell Microsoft right now?

Microsoft was one of the first companies to really jump-start the artificial intelligence (AI) boom, underscored by a $10 billion investment in ChatGPT developer OpenAI. This move allowed the company to swiftly integrate a host of AI-powered services throughout its ecosystem -- like the workplace Office suite, Azure cloud computing infrastructure, social media platform LinkedIn, and more.

Microsoft has undoubtedly emerged at the forefront of the AI marathon, but there are legitimate questions surrounding the company's leading position. You see, the deal with OpenAI inherently raised the stakes for others in big tech.

In particular, its primary competitors in the cloud computing space, Amazon and Alphabet, followed up the deal with OpenAI by each investing in a competing start-up, Anthropic. On top of that, enterprise software company Salesforce recently announced that it's launching a competing service to Microsoft's Copilot AI.

There has been some contraction in the stock's valuation in recent months, but the company's forward price-to-earnings multiple (P/E) of 32.4 is still pretty pricey. To add some context, the average forward P/E of the S&P 500 is only 22.7.

MSFT PE Ratio (Forward) Chart
MSFT PE Ratio (Forward) Chart

Below, investors can see that Citadel has been steadily trimming its position in Microsoft for the last few quarters.

  • Q2 2023: 3.4 million shares

  • Q3 2023: 5 million

  • Q4 2023: 4.2 million

  • Q1 2024: 2.9 million

  • Q2 2024: 1.2 million

To me, Microsoft remains a compelling opportunity in the AI landscape, but at the same time, I am wary about how the company really stacks up against the competition. I think it's just too early to say with any certainty one way or the other.