The operator’s New York-quoted shares plummeted 6.47% to $83.01 in afterhours trading, which marks a new 52-week low.

The sell-off followed an announcement in which Kirby said it expects net earnings to be in the $1.10 to $1.20 per share range, which represents a $0.20 reduction.

“For the full year, Kirby is revising 2014 guidance to $4.84 to $4.94 per share, below previously announced guidance of $5.04