CareDx (CDNA) shares rallied 5.5% in the last trading session to close at $8.28. 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 20.3% loss over the past four weeks. CareDx scored a strong price increase, driven by investors’ optimism surrounding the recent appointment of John W. Hanna as the new President and Chief Executive Officer of the company. Hanna joins CareDx with more than two decades of executive l ...