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TrustFinance Global Insights
มี.ค. 06, 2026
2 min read
10

S&P Dow Jones Indices has announced its quarterly rebalancing, adding several technology and industrial firms to the S&P 500. Vertiv Holdings Co and EchoStar Corporation are among the notable additions, triggering significant after-hours trading activity. These changes are set to take effect prior to the market opening on Monday, March 23.
The update aims to ensure the index accurately represents its market capitalization range. Vertiv, Lumentum Holdings, Coherent Inc, and EchoStar will join the S&P 500. They will replace Match Group Inc, Molina Healthcare Inc, Lamb Weston Holdings Inc, and Paycom. Additionally, the S&P 100 will add Micron Technology and GE Vernova while removing PayPal Holdings and American International Group.
Following the announcement, Vertiv shares surged 5.6% in after-hours trading, with other new entrants also seeing gains. The rebalancing is expected to cause billions of dollars in passive fund flows. Institutional investors managing portfolios that track these benchmarks will be required to buy the newly added stocks and sell the removed ones, leading to increased trading volume and potential price volatility around the effective date.
This rebalancing highlights a continued shift in market leadership towards technology and key industrial sectors. Investors will closely watch trading activity as funds realign their holdings to match the updated composition of the major indices. The adjustments reflect the dynamic nature of the US economy and corporate landscape.
Q: Why are companies added or removed from the S&P 500?
A: Companies are adjusted based on criteria like market capitalization, liquidity, and sector representation to ensure the index accurately reflects the large-cap segment of the U.S. equity market.
Q: What is the immediate impact when a stock is added to the S&P 500?
A: The stock typically experiences increased demand and a price increase as index funds and ETFs tracking the S&P 500 are obligated to purchase its shares to match the new benchmark.
Source: Investing.com

TrustFinance Global Insights
AI-assisted editorial team by TrustFinance curating reliable financial and economic news from verified global sources.
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