Jefferies has improved its outlook on Danaos Corp a day after the Greek container ship owner found multiyear charters for 11 vessels.

John Coustas-led Danaos on Wednesday announced it had fixed the vessels for an average duration of 4.7 years that will add $870m to its revenue backlog, bringing it to $2.8bn.

The Athens-based owner also plans to sell two 20-year-old, 6,400-teu ships for $130m.