Apple and Nvidia now account for over 15% of S&P 500, smashing concentration record
Apple and Nvidia’s combined weight in the S&P 500 has surged past 15%, according to BigGo Finance, setting a new benchmark for concentration that surpasses even the dot-com bubble peak. The two tech giants now wield…
Source: finance.biggo · September 25, 2026 at 9:02 AM · AI-assisted report
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KUALA LUMPUR, 25 SEPTEMBER 2026 —
Apple and Nvidia’s combined weight in the S&P 500 has surged past 15%, according to BigGo Finance, setting a new benchmark for concentration that surpasses even the dot-com bubble peak. The two tech giants now wield outsized influence over the index’s movements, reshaping market dynamics.
Market Impact
Peter Mallouk, president of wealth management firm Creative Planning, called the concentration unprecedented. “The S&P 500 has never been this dominated by just two stocks,” he said, warning that such extreme ownership distorts the index’s diversification benefits.
Historical comparisons underscore the shift. On the eve of the dot-com crash, Microsoft and General Electric together accounted for just 9.1% of the S&P 500, according to BigGo Finance. Today’s 15% threshold exceeds that by more than five percentage points, reflecting how Apple and Nvidia’s market capitalizations have ballooned.
Apple’s stock performance has driven much of the surge. Earlier this month, the company unveiled the iPhone 18 and its first foldable device, the iPhone Duo, sparking aggressive buying that pushed shares to a record $345. While Apple’s year-to-date return remains near 24% to 25%, the stock has since retreated modestly amid broader market pullbacks.
Nvidia’s dominance stems from its AI chip leadership. The company projected at least 70% business growth for its next fiscal year, with CEO Jensen Huang suggesting growth could exceed 100% absent supply constraints. Nvidia closed at $224.58 on September 24, up roughly 20% to 21% year-to-date.
The S&P 500’s market-cap weighting means Apple and Nvidia’s influence grows as their valuations expand. Their combined market capitalization now distorts index performance, raising risks if either company faces earnings misses or regulatory headwinds.
Mallouk highlighted the erosion of diversification. “Index funds were meant to spread risk, but as the index concentrates, that benefit fades,” he said. The shift contrasts with the dot-com era, when speculative bets on unprofitable internet stocks drove concentration—today, Apple and Nvidia’s growth is underpinned by actual earnings.
Apple’s cash flow from hardware and services, alongside Nvidia’s AI-driven revenue growth, sustains their dominance. Yet risks persist: Nvidia’s expansion depends on AI capex, while Apple faces a maturing smartphone market. A downturn in either could amplify volatility.
Analysts urge monitoring both companies’ fundamentals. If concentration deepens, the S&P 500’s volatility profile may shift, impacting index-based strategies. Investors now face a market where a handful of stocks dictate performance more than ever.
Malaysia’s stake lies in the broader tech supply chain. Semiconductor assembly and data center investments—key to AI and smartphone production—position the country as a downstream beneficiary of Apple and Nvidia’s growth, though direct exposure remains limited.
The record concentration reflects a market increasingly reliant on mega-cap tech. While earnings support current valuations, structural risks loom. Should AI demand falter or Apple’s growth stall, the S&P 500’s sensitivity to these two stocks could expose investors to sharp swings.