Key TakeawaysDiscussions over Cigna's possible purchase of Humana reportedly have resumed after the two health insurers failed to strike a deal last year.Bloomberg said the talks are in their early stages.Humana has struggled lately as Medicare changes negatively impact results, while Cigna is selling its Medicare business to HCSC. Humana (HUM) shares edged higher Monday morning on a report that The Cigna Group (CI) has resumed discussions to buy its smaller health insurance rival after negotiations fell ap ...