This is the interest cost of holding an asset for a period of time. It is either the cost of funds to finance the purchase (real cost), or the loss of income because funds are diverted from one investment to another (opportunity cost).
The costs incurred in buying an asset today and carrying it through to the delivery day of a future. Such costs may include finance costs, insurance, storage etc. and will be reduced by the benefits of holding certain assets such as dividends and coupons.
Expenses incurred while a position is being held; for example, interest on securities bought on margin, dividends paid on short positions, and other expenses.