Answer:
There are two possible explanations for why the manufacturers lost money by leasing cars:
- the estimated residual value was miscalculated, and probably was actually lower than real market price.
- the method used to sell returned cars was not efficient. Since returned cars were auctioned, that method was probably not the best way to obtain the highest possible price for the cars. It was a relatively fat method of selling the cars, but not very efficient.
If the residual value was calculated correctly, then the car manufacturers should have changed their method of selling the returned cars, and probably should sell them directly.