The global containership orderbook has sunk to its lowest level in two decades,prompting a handful of New York-listed tonnage providers to adopt a rosier market outlook.

Boxship owners Danaos and Global Ship Lease (GSL) have expressed “cautious optimism” after the orderbook dropped to less than 10% of the global fleet.

“The orderbook is currently in single digits as a ­percentage of the world fleet for the first time in 20 years,” Danaos chief executive John Coustas told ­analysts on an earnings call last week.