Weekly Wrap: Bond Buyers Return as AI Leadership Fractures

A major rotation defined the week as investors moved away from AI trades and back toward defensive stocks and government bonds.

The Dow Jones Industrial Average ($DJI) and Dow Transports led the broader market over the past week, while the S&P 500 (SPX) slipped modestly, and the Nasdaq-100 (NDX), and Russell 2000 (RUT) lagged more noticeably. Thursday’s session initially extended the technology selloff before buyers stepped in, and falling Treasury yields helped stocks recover into the close.

Inflation remains an important catalyst. September CPI rose 0.6% month over month and 3.7% year over year, above expectations, with gasoline accounting for more than half of the monthly increase. Core CPI increased 0.3% and 2.6% year over year. Producer inflation was even hotter, up 1.3%, printing the largest monthly increase since 2022, while energy costs surged. Normally, that combination would pressure Treasuries, but bonds rallied instead in a move that may suggest some investors were weighing AI valuation and credit concerns alongside inflation risks.

This represents an important change in market behavior. For much of the year, enormous equity gains, government borrowing, and private-sector demand for capital associated with the AI infrastructure buildout coincided with heavy pressure on bonds. This week, traders increasingly crowded into Treasuries and out of AI mega-cap and infrastructure trades, restoring some of the bond market’s traditional safe-haven role. The shift came despite hot inflation, suggesting investors are becoming more concerned about whether highly leveraged AI infrastructure spending can generate adequate returns at today’s cost of capital.

Semiconductor Earnings Hit Records

Semiconductor earnings themselves remained impressive. ASML (ASML) reported record quarterly sales and said customer demand is strong enough that some clients are already discussing equipment needs for 2029 and 2030. Taiwan Semiconductor Manufacturing (TSM) reported record profit, with earnings jumping sharply as demand for leading-edge AI processors remained exceptionally strong. Yet both stocks struggled to sustain gains, demonstrating how elevated expectations can overwhelm strong quarterly results during a broader risk reset.

China added another complication. ChangXin Memory Technologies, or CXMT, announced progress on a denser, more power-efficient memory architecture and plans for additional server-memory products. Commercial viability at scale remains uncertain, but the news pressured Micron (MU), SanDisk (SNDK), SK Hynix (SKHY), and other adjunct names because greater Chinese supply could eventually challenge the scarcity-driven pricing power that has fueled extraordinary gains across the memory complex. See: MU, ASML & TSM: AI Demand Remains Strong Despite the Selloff

Bank Earnings: Solid, But a Divergence

Bank earnings were broadly solid but revealed another important divergence. Goldman Sachs (GS), Morgan Stanley (MS), and JPMorgan Chase (JPM) reported exceptionally strong equities-trading businesses, while fixed-income trading was weaker as sharp interest rate moves discouraged some bond-market activity. Goldman’s equity revenue surged, while JPMorgan and Bank of America (BAC) missed overall profit expectations. The results suggest consumers and trading activity remain healthy, but capital-market conditions have become less forgiving. See: Regional Bank Earnings Follow the Big Banks’ Lead

Sector Performance Fortified the Defensive Rotation

Healthcare, consumer staples, and real estate were the week’s top three groups. Healthcare and staples benefited from investors seeking stable earnings and cash flows, while real estate recovered as Treasury yields fell sharply Thursday. Technology and industrials were the two weakest sectors, with technology absorbing the AI unwind and industrials pressured by higher financing costs and concerns about the sustainability of the capital-spending boom.

Overall, the market is not abandoning AI, but may be repricing risk. Strong ASML and TSMC results may demonstrate that semiconductor demand remains robust. The bigger question has shifted from whether AI demand exists to whether the returns will justify the extraordinary capital required to satisfy it.

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