AI Swallows Wall Street: Stocks Hit Record 45% of S&P 500 Market Cap
Artificial intelligence has now expanded its dominance to US equities and the credit score market.
The shift is rewriting how capital flows by means of Wall Street, with AI-linked corporations crowding out conventional sectors from benchmark indices whereas additionally redefining the biggest corners of the bond market.
AI Stocks Hit Record 45% of S&P 500 as Credit Markets Follow Suit
AI-linked shares now account for a record 45% of the S&P 500’s whole market cap, based on information from The Kobeissi Letter. That share has risen by 20 proportion factors since OpenAI launched ChatGPT in November 2022.
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The shift within the credit score market is equally stark. A file 15.4% of US investment-grade debt is now tied to AI, up +3.5 factors since 2020. It has additionally turn out to be the market’s largest section.
Total AI-linked debt has almost doubled since 2020, reaching an all-time high of $1.4 trillion. Hyperscalers corresponding to Amazon, Alphabet, Meta, Microsoft, and Oracle have dominated the pattern.
Together, the 5 issued $121 billion in US company bonds throughout 2025, nicely above the $28 billion annual common they posted between 2020 and 2024.
“Never earlier than has a single theme dominated each US fairness and credit score markets to this magnitude,” The Kobeissi Letter wrote.
The AI commerce can be reshaping world fairness management. Taiwan’s inventory market cap climbed to $4.14 trillion, passing the UK’s $4.09 trillion for the primary time.
The nation’s market cap has tripled since 2020, pushed nearly fully by semiconductor shares. Taiwan Semiconductor Manufacturing Company (TSMC) alone accounts for greater than 40% of the market capitalization.
In impact, the trajectory of AI adoption and monetization could now set the path for a lot of the worldwide market. Meanwhile, any pause might expose how a lot of that valuation rests on a single theme.
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