Data: US Stock Market Capitalization Concentration Hits All-Time High, Top 10% of Stocks Account for 78% of Total Market Value

BlockBeats News, September 27th, Transaction Information Platform Kobeissi Letter released data: Currently, the top 10% of market-capped stocks in the United States account for 78% of the total market cap of the U.S. stock market, marking a historical high. This ratio is 3 percentage points higher than the record high in the 1930s and higher than the peak during the 2000 Internet bubble period, when the ratio was 74%.

In contrast, in the 1980s, the total weight of the top 10% of market-capped companies was less than 50%. At the same time, the top 10 stocks accounted for a record 41% of the S&P 500 Index's market cap, making the market more concentrated than ever before.