Shares of Humana (NYSE:HUM) are trading near $303 at midday Monday, slightly lower on the session after a flat open. The one-month picture, however, tells a very different story. Humana stock is up 48% over the past month, dwarfing peers in the managed care complex. That run has put Humana well ahead of UnitedHealth Group ... Humana Just Ripped 48% in a Month. Is It Outperforming Other Healthcare Stocks Like UnitedHealth and Cigna?