The bond market just flashed a warning sign that equity investors can't ignore. For the first time, fixed-income investors have named an AI bubble as their number one concern, according to a new Bank of America survey released this week. The shift marks a dramatic change in sentiment from institutional money managers who've largely sat on the sidelines of the AI rally, and it signals that worries about frothy valuations are spreading beyond tech-focused equity funds into the traditionally conservative world of bonds.
The bond market has spoken, and it's worried about artificial intelligence. Bank of America's latest investor survey shows fixed-income managers ranking an AI bubble as their primary concern - a first for the monthly pulse check that's been tracking sentiment for years. The finding carries weight because bond investors typically focus on credit risk and interest rates, not equity market froth. When they start worrying about tech valuations, it means they see potential ripple effects across the entire financial system.
The timing isn't accidental. AI companies have collectively raised hundreds of billions in capital over the past 18 months, with Microsoft, Google, Amazon, and Meta alone committing over $200 billion in infrastructure spending for 2025 and 2026. That money is flowing into data centers, chips from Nvidia, and massive computing clusters - all funded through a mix of cash reserves and corporate debt. Bond investors are now questioning whether the revenue from AI products will ever justify these expenditures.
The concern extends beyond just the tech giants. Smaller AI startups have been issuing debt at aggressive terms, betting that their valuations will continue climbing. But with OpenAI still burning through billions annually despite ChatGPT's popularity, and enterprise adoption of AI tools moving slower than projected, fixed-income managers are starting to price in default risk. According to the survey data, bond spreads for AI-focused companies have widened by an average of 45 basis points over the past quarter.
