Charterers are locking in panamax and kamsarmax bulkers on period charters as rates rise in the spot market, hitting a new 11-year high on Tuesday.

On Tuesday, one kamsarmax was locked in for a year, while a day earlier two kamsarmaxes and two panamaxes were reported fixed on period contracts of less than a year's duration.

Panamax freight rates saw another big rise on Tuesday, bringing the spot market to the highest level...