Calm Breaks: A 50-Day Streak Ends as AI Credit Fears Hit Stocks, Bonds and Gold

The session ended a 50-day stretch of unusual calm in US stocks, with a broad selloff pushing investors into gold, which steadied near $4,160 an ounce, and into government bonds, which pulled Treasury yields lower. The move mattered because it was the first real test of whether the year's rally could absorb bad news rather than shrug past it, and the market's answer was to run for safety. The proximate cause was stress in the credit that underpins the artificial-intelligence buildout. CoreWeave, a company that borrows heavily to build AI data centres, saw its borrowing costs climb toward 15%, a level that signals lenders now see real risk in the sector's debt. Several data-centre IPOs stumbled during the session, and chip stocks split sharply between names seen as sell-off victims and those still viewed as long-term winners, leaving analysts divided over whether the AI chip pullback was a brief wobble or the start of a trend reversal. The mechanism is straightforward: when borrowing gets more expensive, the economics of debt-funded AI infrastructure get worse, and equity investors price that in immediately while credit investors demand more yield to compensate. That credit stress collided with mixed inflation data. The producer price index, which measures prices businesses receive for their output and often leads consumer inflation, rose 1.3% in September, a hotter print than expected, even as September retail sales beat forecasts and showed consumer demand holding up. Fed governor Kevin Warsh avoided tipping his hand on whether the central bank would cut rates at its October meeting, and Chicago Fed president Austan Goolsbee called the inflation picture