Norfolk Southern's (NYSE:NSC) short percent of float has risen 3.57% since its last report, with 2.63 million shares sold short, which is 1.16% of all regular shares available for trading. It would take traders 2.61 days to cover their short positions on average. An increase in short interest can signal that investors have become more bearish. Norfolk Southern's peer group average for short interest as a percentage of float is 0.82%, indicating the company has more short interest than most of its peers.