The AI buildout just got a bigger interest bill
Edition of 2026-09-28
# AI For All ### Monday, September 28, 2026
As of today, a lender, an analyst or a financial adviser with AI infrastructure in the book has to deal with a buildout that pays crisis era rates, and with borrowers whose interest bills move with every step the ten year Treasury takes.
The bill for the buildout just moved to crisis rates
Treasury yields climbed this week to their highest level since before the financial crisis, and the AI buildout is the largest borrower in the queue. JPMorgan's estimate of the wave coming is *$4.1 trillion* of AI related debt issued through 2030, as data centre operators race to build capacity.
The price those borrowers now pay is the ten year Treasury near *5.17%*, roughly a percentage point above where it started the year. That means issuers have to offer sweeter terms to fill a book. SoftBank raised billions this week in a junk bond sale and had to pay up for the longest slice. Market participants describe the buyers as price takers rather than price setters, which is a polite way of saying the money has to be raised whatever it costs.
The cleanest figure in the whole story is CoreWeave's own. Its latest quarterly filing works out that for each step up in rates, interest expense rises by *$30 million*, on the balance of its floating rate debt alone. Oracle, which has leaned on the debt market for its AI expansion, has lost about a third of its market value this year. If you hold AI infrastructure debt, or you advise someone who does, this is the quarter the arithmetic changed.
The web's visitors are mostly not people
Cloudflare's annual founders' letter says automated traffic passed human traffic in May of this year, pulling its own forecast forward. It had expected that crossover in the second half of next year. The letter now puts machine traffic at *1,000 times human traffic* within five years if current trends hold, and calls that reading conservative.
The part worth your attention is who carries the cost. An agent told to pick a restaurant may work through every menu in the neighbourhood to recommend one, and the sites that served those pages got nothing for the load. Cloudflare says more than half of what well behaved bots fetch has not changed since their last visit, so most of that load is waste. The company counts *more than 7 million developers* building on its developer platform, which is a lot of people whose pages are being read by machines.
Its answer, announced this week rather than dated: let crawlers see more of the web while fetching only what is new, and give publishers a way to be paid when agents use what they have built. The letter also names the risk plainly. As agents handle more commerce they favour whoever they have the most information about, which is usually whoever has been around the longest. If you buy digital advertising or run a small site, that is the trend to watch.
Weak signal
Anthropic's chief executive had a private dinner with President Trump at the White House on Sunday, the first one on one meeting between them, after he skipped the state dinner for Xi Jinping. The timing is the signal: Dario Amodei publicly asked the industry to slow down, Trump answered him on social media and not kindly, and now there is a place at the table. Nothing a reader can act on today, no rule attached. Kept because the thread that decides what frontier labs may ship runs through this relationship.
Two stories cleared the bar this morning, and both come down to the same question: who pays for the buildout, in money or in traffic.