2min snip

We Study Billionaires - The Investor’s Podcast Network cover image

TIP595: Stock Market History & The AI Bubble w/ Jamie Catherwood

We Study Billionaires - The Investor’s Podcast Network

NOTE

Historical Concentration of Top 10 Stocks in the US Market

The US market has been consistently concentrated at the top since the 1930s, with the top 10 stocks holding a significant percentage of the index. Despite the current market's concentration, historical data shows that similar levels of top-heavy concentration have been observed in previous decades, with the top 10 stocks accounting for 26.7% in 1950, 31% in 1960, and 33% in 1940. Remarkably, AT&T held the top spot for four consecutive decades as the largest stock in the index.

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