Guardant Health shares rise 1.21% after-hours following Gilead's stock increase due to a favorable US Supreme Court ruling on preventive care coverage.

Guardant Health, Inc. rose 1.21% in after-hours trading, following a U.S. Supreme Court ruling that upheld a federal mandate requiring health insurers to cover preventive care services, including cancer screenings, at no extra cost to patients. This decision supports the preventive healthcare services sector, which is beneficial for companies like Guardant Health, Inc. that focus on cancer detection and treatment.