On Monday the AI trade still looked like a sure thing. At one point Thursday CoreWeave (CRWV) was down 28% from the start of the week. Then Nvidia (NVDA) chief Jensen Huang said CoreWeave's strength is “improving every day.” The stock closed up 6%. The Journal's markets team compared the week to a tornado.
CoreWeave rents high-end chips to companies that train and run AI models. It used to mine crypto. It went public in 2025. And it runs on borrowed money. FactSet counts at least $35 billion of debt on its books. CreditSights expects it to burn about $80 billion of cash over the next 3½ years. S&P Global rates its credit “B,” a grade the agency calls highly speculative.
This week the bond market said the quiet part out loud. The cost of insuring CoreWeave's debt against default hit an all-time high. Some unsecured bonds fell below 80 cents on the dollar Wednesday. One bond due in 2031 yielded more than 10 percentage points above Treasurys. That's the line where Wall Street starts using the word distressed. David Busch of Trajan Wealth said the bond market is pricing “a higher default risk.” Back in July, CoreWeave's bankers had to reprice a loan above a 10% yield just to fill the order.
Who pays for 5% yields
Here's the split. Microsoft (MSFT) and Alphabet (GOOGL) pay for data centers out of cash. Their shares barely moved all week. The borrowers got hit. Nebius fell 15% and IREN fell 14%, about the same as CoreWeave's 15% weekly drop. Ali Bendarkawi of AllianceBernstein described higher rates as a tax on the marginal borrower. Saxo's Charu Chanana wrote that markets are now more demanding about profit, financing and discipline. There's a bull case too. Bank of America raised its revenue-growth forecasts for CoreWeave on Thursday. Retail investors bought a record amount of the stock on Wednesday.
Thursday's broader market was calmer. Investors sold chip makers and bought gold and Treasurys. The 10-year yield settled at 5.086%, down from 5.189% Wednesday. The Dow rose 556 points, or 1.1%. The S&P 500 gained 0.3% to 7744.06 and the Nasdaq inched up 0.1%. Wednesday had been the worst day since July.
Our read
This is Investments/Risk · IN04 with a Fixed Income · IN02 lesson inside it. We own this story. CoreWeave is held in one satellite sleeve, the Chips Supply book, at 16%. Nothing added, nothing trimmed. The chip names it buys from are held at weight across the main books: Nvidia in 31, Microsoft in 29, Alphabet in 28, Oracle (ORCL) in 13. Those positions didn't need a decision this week. The 16% position gets watched, and the bonds are the signal. When a company's bonds trade at distressed yields, the bond market is saying something the stock may not have priced yet. Our default is to hold the sleeve at its size and let the bond price tell us if that should change.
Your own plan touches this in one spot, the growth sleeve of your 401(k) or brokerage account. Most AI exposure arrives through a fund, and most people can't name that fund's top ten holdings. This week's check is to open the fund's holdings page and look for the debt-funded names the paper lists, CoreWeave, Nebius and Oracle. Then look at what share of the whole account any single AI name has become after two years of gains. Over 5% of the account in one stock is a position, not a passenger. You check the hitch before the trailer sways, not after. It's a 15-minute look, and it's one we'd be glad to do with you in a review.