This works if you don't care about churn, or necessarily moving a certain number of units/preserving capacity on a given day. As there are only 17 days until t

This works if you don't care about churn, or necessarily moving a certain number of units/preserving capacity on a given day. As there are only 17 days until the theoretical peak delivery date there isn't much room to adjust. A miss-price on December 20th may cause you to sell out remaining capacity or worse favor one customer over others. A second price auction market for available capacity could allow the market to adapt fast and transparently to available capacity.