How The S&P 500 Quietly Became An AI Fund

The S&P 500 index has long been a go-to investment for those seeking broad market exposure, but that may be changing. AI-fueled growth in companies like Nvidia, Microsoft and Apple has given them outsized influence, with the top five companies now making up nearly 30% of the index. Watch the video above to learn how artificial intelligence is transforming the makeup of the S&P 500, what that means for investors and whether your retirement portfolio is more concentrated than you think.

Chapters:
0:00 Introduction
1:45 How AI became such a big part of the S&P 500
3:40 Set it and forget it?
7:15 Diverse portfolio

Produced and Shot by: Charlotte Morabito
Edited by: Andrea Miller
Additional Reporting: Chris Hayes
Additional Camera: Jordan Smith
Animation: Emily Park, Jason Reginato
Senior Director of Video: Lindsey Jacobson
Additional Footage: Getty Images

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How The S&P 500 Quietly Became An AI Fund

Post from CNBC on October 22, 2025

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