Guardant Health (GH) shares rallied 6.3% in the last trading session to close at $35.88. This move can be attributable to notable volume with a higher number of shares being traded than in a typical session. This compares to the stock's 8.4% loss over the past four weeks.The company’s blood test, Shield, is approved by the FDA for colorectal cancer (CRC) screening in adults aged 45 and older who are at average risk for the disease. According to Guardant Health, Shield provides an easy, convenient and pleasa ...