Marvell and Flex Join S&P 500 on June 22, Signaling Tech Shift

S&P Dow Jones Indices announced on June 5 that Marvell Technology and Flex will join the S&P 500 effective June 22, 2026. The two companies replace Pool Corp and The Campbell’s Company. Marvell stock rose 5% in extended trading after the announcement. Flex rose 4%. The move highlights how technology and AI infrastructure companies now dominate the benchmark index.

Why These Two Companies Won Inclusion

Marvell designs semiconductor chips for AI data center infrastructure. Nvidia CEO Jensen Huang called Marvell the “next trillion-dollar company” this week, and Nvidia invested $2 billion into the chipmaker. Flex manufactures electronics for major tech firms including Apple and Nvidia. Both companies have grown significantly. Marvell stock is up 210% year-to-date and 286.5% over the past year. Flex stock is up 151% year-to-date and 257% over the past year.

What Index Inclusion Means for Investors

Index funds that track the S&P 500 must now own Marvell and Flex shares. This automatic buying can increase trading volume and stock price around the inclusion date. Meyka rates Marvell a B+ with a 12-month price target of $121.99, suggesting limited upside from the current $263.47 price. Flex carries a B+ rating with a 12-month target of $86.15, implying 43% downside from $151.92. Both stocks trade at elevated valuations. Marvell trades at a P/E of 90.54, while Flex sits at 65.2.

The Broader Index Rebalance

The S&P 500 changes are part of a quarterly rebalance effective June 22. S&P Dow Jones also announced changes to the S&P MidCap 400 and S&P SmallCap 600. Roku joins the MidCap 400. Other tech companies added to these indices include Semtech and Sanmina. The rebalance ensures each index remains representative of its market capitalization range. Companies removed are no longer representative of their respective market segments.

Tech Sector Dominance Grows

Marvell and Flex are the latest technology firms added to the S&P 500. Recent additions include Veeva Systems, AppLovin, Datadog, DoorDash, and Robinhood. The S&P 500 fell 2.6% on June 6 to 7383.73, with semiconductor stocks leading losses. Micron dropped 13%, Intel fell 11%, and Marvell itself fell 16.7% on June 6 despite the inclusion news. The PHLX Semiconductor Index dropped 10.3%, its worst day since March 2020.

Final Thoughts

Marvell and Flex’s S&P 500 inclusion on June 22 will drive automatic buying from index funds, but both stocks trade at stretched valuations. Meyka’s price targets suggest limited upside for Marvell and significant downside for Flex from current levels.

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The content shared by Meyka AI PTY LTD is solely for research and informational purposes.  Meyka is not a financial advisory service, and the information provided should not be considered investment or trading advice.