Key Points
The S&P 500’s top 10 holdings currently represent about 40% of the index’s total value, a significant increase from approximately 23% in 2000. This concentration means a few companies can considerably influence the index’s performance.
As of now, the S&P 500 has risen nearly 77% over the past three years, while the Nasdaq Composite has soared by about 94%. Notably, large tech stocks, driven by advancements in AI, contribute significantly to this growth. The “Magnificent Seven”—Apple, Alphabet, Amazon, Meta Platforms, Microsoft, Nvidia, and Tesla—accounts for approximately one-third of the S&P 500’s value, with each having a market capitalization of at least $1 trillion.
Despite a recent decline of nearly 3% for the S&P 500 since late May 2026, the rest of the index, excluding the Magnificent Seven, is up about 2.5%. Historically, the S&P 500 has recovered from downturns, demonstrating resilience over the long term, with total returns exceeding 700% since 2000.
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