Data: The concentration of market capitalization in US stocks has reached a record high, with the top 10% of stocks accounting for 78% of the total market value.

BlockBeats news, on September 27, the trading information platform Kobeissi Letter released data: the top 10% of stocks by market capitalization in the United States account for 78% of the U.S. stock market's market capitalization, a record high. This is still 3 percentage points higher than the record high from the 1930s, and it is also higher than the peak during the internet bubble in 2000, when the ratio was 74%. In contrast, in the 1980s, the total weight of the top 10% of companies by market capitalization was less than 50%. Meanwhile, the top 10 stocks account for a record 41% of the S&P 500 index's market capitalization percentage, and the market has never been this concentrated.