At the conference, researchers presented data from a number of studies using molecular diagnostic tools to better characterize breast cancer recurrence and treatment outcomes.
November's modest gain followed a tough October, when the index down almost 9 percent. Meridian Bio paced the gainers, and NantHealth was the steepest decliner.
The test is approved to gauge germline BRCA mutations in advanced breast cancer patients who may benefit from treatment with Pfizer's PARP inhibitor Talzenna.
Guardant Health said this week that it closed an initial public offering of approximately 14.4 million shares of its common stock at $19 per share, raising gross proceeds of about $273.1 million.