Cigna (CI) shares ended the last trading session 6.3% higher at $282.41. The jump came on an impressive volume with a higher-than-average number of shares changing hands in the session. This compares to the stock's 17.7% loss over the past four weeks.Cigna’s recent price movement stems from recovering investor confidence in the prospects of the company after an overreaction by investors to the new resolution targeting pharmacy benefit managers. These provisions were initially feared to impose stringent regu ...