🔴 Korro Bio is trading 5.7% down today amid a 2.01% decline in biotech ETF XBI

Korro Bio is trading 5.66% down at $8.84, with broader biotech weakness offering context but no direct cause established.

• XBI, the biotech sector ETF, is down 2.01% during the regular session.
• Searches found no clear company-specific announcement on October 13. KRRO-121 first-cohort dosing news and an analyst rating update date to October 5–6, so they do not explain this session’s decline.