The minimum amount of gas that may be traded on the OCM is 4,000 therms, so if a shipper's position is long or short by a volume less than 4,000 therms they may be forced simply to leave their balance to cash out.
The minimum volume of gas that can be traded on the OCM is 4,000 therms. Consequently, if a shipper's position is less than this amount in terms of quantity, they may need to cash out by leaving their balance untraded.