Healthcare sector rallies in October amid rotation away from technology stocks

What happened

Healthcare stocks rose in October, with the Health Care Select Sector SPDR Fund gaining nearly 9.5% as investors moved money out of technology shares into defensive sectors like healthcare. Regeneron Pharmaceuticals led gains at 26.28%, while Illumina was the biggest decliner.

Confirmed

Global impact / market context

Money moving into healthcare can support share prices for drugmakers, labs and device companies, even when their own results are mixed. That matters because steady healthcare cash flows may attract investors seeking stability, which can lower borrowing costs and fund research spending.

Analyst inference

The rotation suggests investors favored defensive sectors offering established cash flows over high-flying technology shares. Within healthcare, gains were uneven: Regeneron, Charles River and Eli Lilly rose on strong results and outlooks, while Illumina fell, showing company-specific news still drove individual moves.

Analyst inference

What to watch

1. Regeneron gained 26.28% after higher-than-expected quarterly results, with about 36% year-over-year revenue growth driven by its Sanofi collaboration, which means partnership revenue sharing. Confirmed
2. Eli Lilly rose nearly 23.3% after third-quarter results and an increased full-year 2026 revenue outlook, driven by strong demand for Mounjaro and Zepbound, which are its diabetes and weight-loss drugs. Confirmed
3. Watch whether healthcare keeps attracting money away from technology, since sustained inflows could support capital spending and research budgets at drugmakers, labs and device companies. Analyst inference

Evidence

• seekingalpha.com