S&P 500 Concentration Hits Record — Top 15 Stocks Now 46.7% of Index
The 15 largest S&P 500 stocks now account for a record 46.7% of index weight, nearly double the 27.2% share they held at the peak of the 2000 Dot-Com Bubble.
What we know
An account on X reported the striking stat: the top 15 S&P 500 stocks represent 46.7% of total market cap, dwarfing the 2000 bubble's 27.2% peak concentration. The remaining 485 stocks account for just 53.3%. This framing was implicitly echoed by concerns about AI mega-cap driven rallies elsewhere in the feed. The data point feeds directly into the AI bubble vs. supercycle debate dominating the session.
By the Global Eye 24 desk, with AI assistance. Updated as the story develops. Spot an error? Write to corrections@globaleye24.com.