Humana's (NYSE:HUM) short percent of float has risen 4.21% since its last report, with 2.75 million shares sold short, which is 2.23% of all regular shares available for trading. It would take traders 2.79 days to cover their short positions on average. An increase in short interest can signal that investors have become more bearish. However, Humana's peer group average for short interest as a percentage of float is 3.07%, which means the company has less short interest than most of its peers.