Healthcare Stocks Rally in October as Investors Rotate Out of Technology

what happened

Healthcare stocks climbed sharply in October, with the Health Care Select Sector SPDR Fund up nearly 9.5%. According to Seeking Alpha, investors sold expensive technology shares and moved into defensive sectors with steady cash flows, such as healthcare.

Regeneron Pharmaceuticals led the month with a 26.3% gain. The company reported third-quarter 2026 results above expectations, with revenue up roughly 36% year on year, helped by its collaboration with Sanofi. Charles River Laboratories rose 25.3%, and Eli Lilly gained 23.3% after its quarterly report and a higher full-year 2026 revenue outlook, supported by demand for Mounjaro and Zepbound.

Illumina was the biggest laggard, falling 11.2%. Its third-quarter profit beat forecasts, but revenue fell short. Solventum lost about 7.3%, DexCom dropped 4.6%, and Boston Scientific fell 2.9%.

why it matters

For markets, this signals a shift in sentiment as some capital leaves expensive technology shares for defensive sectors. Results within the sector varied widely, so individual stock moves depended heavily on each company's quarterly report.

market impact

Healthcare sector: capital rotating out of tech supports the group, pressuring tech shares

• ▲Healthcare sector (XLV) pressure up — capital flowing from technology shares into defensive sectors
• ▼Technology stocks pressure down — investors are exiting high-flying, richly valued shares

instruments