Nordic American Tankers is trumpeting its best quarterly performance in nearly three years, with even better days in store.

The Herbjorn Hansson-led company posted a $5.6m profit for the first three months of 2019 a $25.3m improvement over the same period last year and its best, the company said, since the second quarter of 2016.

"The world economy is enjoying its strongest upswing since 2010," the company said.