The Treasury is floating the idea of spending down its roughly $1 trillion checking account to buy long-term government bonds and force interest rates lower — a sign of desperation that is bad news for markets and the AI spending boom holding up the economy.

• That account is not savings; the money is already committed to Social Security, Medicare and other bills, so any of it spent on bonds has to be borrowed right back.
• A first attempt at this — selling short-term debt to buy long-term debt — did nothing; rates snapped back within a day.
• The real worry is not government borrowing costs but corporate ones: lenders are demanding steadily higher rates from the big tech companies building AI data centers.
• Those companies are now spending more on data centers than they take in, so they must keep borrowing — and if borrowing gets too expensive, the spending stops.
• Microsoft has quietly reclassified data center leases out of capital spending, a hint that one-time build costs are turning into permanent overhead.

Outlook: If long-term rates stay high into the midterms, AI spending slows, and with the economy leaning on that spending and on rising stock prices, the whole stack gets shaky.