Source: Alphaliner.
Current situation slot capacities of the fleets operated by the top 100 container lines (in TEU) – Source: Alphaliner
The global container shipping business has a high concentration level, with the top 10 operators accounting for more than 60% of the total capacity. While Maersk and MSC are the two largest container shipping lines, a substantial share of their shipping capacity is leased (about 40 and 60% respectively). Ship chartering is usually done to lower operating costs and accommodate fluctuations in demand. If the demand declines, then the chartering contract is left to expire, and the owner retakes the ship.