Containership owner SITC International Holdings has increased its already substantial profit forecast for 2017.

The Hong Kong-listed line had already predicted a 40% rise in net earnings last December.

Now, after a further review, it said it expects profit to jump 50% for 2017.

Last December's forecast was based on the first 11 months of last year.

It said the spike was due to an increase in volumes and overall improvement of the group’s operating efficiency.