SINGAPORE, Oct 15 (Reuters) - The cost of insuring against US tech defaults has hit record levels in the latest sign of credit stress building in the AI trade, especially for data centres dependent on future revenue.

The cost of protecting against defaults by major US technology companies has risen sharply, reflecting growing investor concerns about debt levels, financing requirements and the potential returns from large-scale artificial intelligence infrastructure investments.

CoreWeave's unsecured bonds fell below 80 cents on the dollar, raising questions about private credit's role in financing the AI buildout.