AdvertisementBusinessMarketsAI Opinion Scared by tech’s debt deluge, investors are questioning the AI boom Stephen Bartholomeusz Senior business columnist July 29, 2026 — 12:07pmJuly 29, 2026 — 12:07pm Save You have reached your maximum number of saved items. Related Article AI OpenAI says its AI models went rogue and attacked a digital library It’s not helping that some of the leading AI models have gone rogue. AdvertisementThe hyperscalers – the biggest of the AI companies – are expected to invest as much as $US750 billion this year. Indeed, the whole AI sector has been increasingly tapping debt markets as equity markets have become satiated with AI exposures – or perhaps their capacity to supply the sector is nearing exhaustion. The four biggest hyperscalers have already raised more than $US400 billion from debt markets this year and total AI-related debt in the market must be at least $US500 billion.