The S&P 500 has reached a new milestone in market concentration as its two largest constituents, Nvidia and Apple, now represent a record 15% of the total index market capitalization. This combined weighting marks the highest level of dominance by the top two companies in the history of the benchmark.
Individually, Nvidia has surged to a record 8% share of the index, while Apple currently accounts for 7% of the total valuation. This unprecedented concentration highlights the growing influence of mega-cap technology firms on the broader equity market performance.