Russell U.S. Index Rebalance: Mega-Caps Shift from Growth to Value

The annual Russell U.S. Index rebalance, also known as the "Russell Shuffle," is a significant event for style-tilt rotations. This year, three of the "Mag 7" mega-caps (Microsoft, Alphabet, and Facebook) crossed the Value/Growth divide. This marks a shift in their market classification, with Microsoft and Alphabet moving from Growth to Value and Facebook moving from Growth to Core. The Russell 2000 Value index also saw significant changes, with the index's largest constituent being packaged foods company Kraft Heinz.

The annual Russell U.S. Index rebalance, also known as the "Russell Shuffle," is a significant event for style-tilt rotations. This year, three of the "Mag 7" mega-caps—Microsoft, Alphabet, and Facebook—crossed the Value/Growth divide. This marks a shift in their market classification, with Microsoft and Alphabet moving from Growth to Value and Facebook moving from Growth to Core. The Russell 2000 Value index also saw significant changes, with the index's largest constituent being packaged foods company Kraft Heinz.

The Russell 3000 Index, which represents roughly 96-98% of the investable US equity market, underwent its annual reconstitution on June 27, 2025. This event refreshes the breakdown of equities by market capitalization (large, mid, and small) and investment style (value and growth). The reconstitution is one of the year’s heaviest trading days as asset managers adjust their portfolios to reflect changes in the newly-reconstituted Russell indexes, to which approximately $10.6 trillion in assets are benchmarked [1].

The Russell 1000 Index, comprised of the largest 1,000 domestic stocks by market cap, added 37 new stocks this year. Among the notable additions were Sailpoint Inc. (NASDAQ:SAIL), Karman Holdings Inc. (NYSE:KRMN), and Core Scientific Inc. (NASDAQ:CORZ). Meanwhile, 25 stocks were relegated to the Russell 2000 Index. The top 10 constituents of the Russell 1000 by market cap now make up nearly $18 trillion of the $55.7 trillion in index assets, representing nearly a third (32%) of the total index [1].

The Russell 1000 Growth Index and the Russell 1000 Value Index also reconstituted, with growth stocks continuing to gain market share relative to their value stock peers. Information technology remained the largest sector in the Russell 1000 Growth Index, rising from 47.6% to 51.2% as of June 30, 2025 [1].

The Russell 2000 Index, representing the next largest 2,000 domestic stocks by market cap, saw a decrease in market cap from last year. The market cap of the Russell 2000 fell to $2.7 trillion, down 7% from the $2.9 trillion the year before. The Russell 2000 remains more diversified than its large cap counterpart, with financials, industrials, and healthcare each representing between 15% and 20% of the index [1].

The Russell 2000 Value Index saw significant changes, with financials holding the top spot, accounting for nearly 28% of the index. The Russell 2000 Growth Index, on the other hand, saw healthcare remain the largest sector, despite slipping from 25.0% to 23.3% of the index [1].

For investors considering adjustments to their portfolios following these changes, it is essential to stay patient while keeping in mind that volatility may pick up over the next few weeks around tariff headlines, incoming inflation data, the upcoming earnings season, and historical seasonal weakness.

References:
[1] https://www.investing.com/analysis/russell-rebalance-sparks-record-102b-surge-as-trillions-realign-by-style-200663741