Central banks are stepping into the AI-bubble debate. Taiwan's central bank governor said the growth behind the AI boom is real but so are the risks, warning of speculative capital spending financed by aggressive corporate borrowing in the tech sector, according to Yahoo Finance. The Bank of England is monitoring AI's growing threat to financial stability, citing concentrated market gains and heavy leverage. Fortune reports the Bank for International Settlements used its 2026 annual report to warn that the five largest hyperscalers are on pace to spend more than $1 trillion on AI over 2025 and 2026 combined, outstripping their earnings and forcing some to issue debt. The Register notes even banks are now sounding the alarm.