Several large containerships have been fixed at firm rates as the profile of the charter market shifts to bigger vessels.

Recent fixtures include the Zeaborn-managed, 5,992-teu ER Kobe (built 2001), which is understood to have been taken by Israeli liner operator Zim for 12 months at $19,000 per day.

Until this week, such fixtures would not have been reflected in the New ConTex Index, a leading measure of charter rates produced by a panel of 16 containership ­brokers and published by the Hamburg and Bremen Shipbrokers’ Association (VHBS).