Treasuries Rally as AI Stocks Slump on Hot PPI
Treasuries led a global bond rally on October 15, 2026, as a selloff in artificial-intelligence shares deepened. Bloomberg
The equity decline spurred demand for havens amid concerns about a growth slowdown. Duration caught a bid while risk sentiment deteriorated.
Dispersion was stark. A gauge of chip giants lost 2.2% even as most S&P 500 companies rose, according to October 15, 2026 stock-market coverage. Bloomberg
Early trading on October 15 was already lower after September wholesale inflation data. Stocks and yields dipped in early trading after the report. September headline PPI increased 1.3%, the second-largest increase on record, while September core PPI posted its biggest gain in four years. Schwab
The session followed a soft patch on Oct. 8, 2026, when U.S. stocks dipped as crude prices surged. The crude surge followed a spike in Middle East tensions and a cut in U.S. output. Reuters
Breadth is thin. As of Oct. 12, 2026, 4 in 10 S&P 500 stocks were down in 2026, with over 200 S&P 500 companies having fallen. Reuters
Credit sensitivity centered on AI infrastructure. CoreWeave stock fell 15% on a Wednesday, a day after a chart of its rising borrowing costs gained traction on X. Yahoo Finance Wall Street expects CoreWeave's revenue to rise 147% year over year in 2026 and 97% in 2027. Motley Fool
Seasonality still favors the bulls on paper. October ranks among the top months for stock market performance by average return, at 1.9%. Yahoo Finance
The broader context here is a difficult mix for equity multiples. Hot producer prices tighten the path for real income growth and for policy easing, while a concurrent bid for Treasuries points to slower growth expectations rather than to confidence in disinflation. That combination tends to punish long-duration equities first, particularly where capital expenditure is debt funded.
In my view, the market structure matters as much as the macro prints. When most constituents hold up and mega-cap chip names fall 2.2%, and when 4 in 10 names are already negative for the year, index-level moves obscure the concentration risk. The CoreWeave price action fits that pattern. Triple-digit expected revenue growth did not offset a repricing of borrowing costs once the chart circulated.
Looking at what this means for portfolio construction, professionals will likely separate two questions. The first is whether PPI pass-through stalls the inflation descent. The second is whether AI-related credit spreads reprice independently of earnings trajectories. October's 1.9% average gain does not resolve either. It only frames the hurdle for dip buying into year-end when leadership is narrow, energy is volatile, and duration is rallying on growth concern rather than on benign cooling.
