Many investors know that the S&P 500 is heavily weighted to companies with exposure to the artificial intelligence sector. Data shows that the market capitalization of AI pure plays in the index is now reaching record levels last seen in the 19th century.
AI Dominance in the S&P 500 AI stocks make up 49% of the S&P 500, which is tracked by the SPDR S&P 500 ETF Trust (NYSE:SPY), which could explain some of the fears of an AI bubble popping. Data from Bianco Research shared on social media shows that along with making up 49% of the S&P 500, the 41 companies named as AI pure plays in the index make up around two-thirds of the S&P 500’s year-to-date market cap changes.
Bianco Research’s Jim Bianco takes things a step further, with just how concentrated in AI the S&P 500 could be had rules been changed or could become in the future. "If SpaceX was in the $SPX now, AI-related stocks would be 51% of the index.
With Anthropic and OpenAI coming public, add them to the $SPX in 2027 and AI would be ~55% of the $SPX," Bianco tweeted. The S&P 500 declined to change its rules to include SpaceX (NASDAQ:SPCX) stock early, instead holding to the normal principles that a company needs profitability and has sufficient float.
S. stock market dates back more than 100 years.
com Inc (NASDAQ:AMZN) Alphabet Inc Class A (NASDAQ:GOOGL) Broadcom Inc (NASDAQ:AVGO) Alphabet Class C (NASDAQ:GOOG) Meta Platforms (NASDAQ:META) Micron Technology (NASDAQ:MU) Tesla Inc (NASDAQ:TSLA) While all the Magnificent Seven stocks are included in the index, the list also includes AI utilities, AI capital equipment companies and a list of AI direct companies across software, cybersecurity and other technology fields. Read Also: EXCLUSIVE: Top 12 Most-Searched Tickers in September on Benzinga Pro – Meta Rises, SpaceX Falls, Dell & Bloom Energy Join List Going Back to the Railroads The S&P 500 was launched in 1957, so it hasn’t been around long enough to be dominated by the railroad sector.
S. stock market capitalization dominated by the sector, which emerged as the top sector and dominated the country.
S. stock market capitalization, according to Bank of America data.
Today, railroads make up less than 1%. S.
stock market since 1900. S.
stock market index at other times, but never near the 63% seen from the late 1880s to 1900. S.
economy, lowering freight and transportation costs and connecting many areas across the country. AI is viewed as a technology that could change and impact multiple sectors in similar ways.
S. stock market would be good or raise even more questions about a potential bubble.
