Health insurance and health services provider, Humana (NYSE: HUM ), the country's second largest Medical Advantage insurer, has slid 10% in the last week. The slide is on the back of the company announcing that it is exiting 13 markets, triggering investor fears An economics graduate with a passion for financial history; I apply my knowledge to markets in an effort to hopelessly predict trends and spot value. All opinions are my own and should not be taken seriously. Analyst's Disclosure: I/we have no stock ...