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AI-driven debt growth is changing corporate bond ETFs
Tech now makes up more than 10% of the Bloomberg U.S. Corporate Bond Index, and hyperscaler debt issuance rose from about $35 billion per year (2020-2024) to $132 billion through mid-2026.
ETF Trends reports that retail investors have increasingly bought corporate bond ETFs for steady coupons and a potential buffer against stock market volatility. The outlet says the traditional fixed-income mix, which often relied on defensive issuers such as banks, industrials and utilities, is shifting as technology debt expands.
According to ETF Trends, technology now accounts for more than 10% of the Bloomberg U.S. Corporate Bond Index, surpassing banks in several major investment grade benchmarks for the first time. The outlet attributes the change to the pace of debt issuance tied to an AI infrastructure buildout.
ETF Trends also highlights how this shift can raise concentration risk for so-called conservative investment grade bond funds. It says passive core bond investors are absorbing growing exposure to large hyperscalers without explicitly choosing it, as the five main hyperscalers, Alphabet, Amazon, Meta, Microsoft and Oracle, issued average debt of roughly $35 billion per year between 2020 and 2024, then about $93 billion in 2025 and over $132 billion through mid-2026.