A mortgage, debenture or other security documentation, is likely to create charges over particular assets as security for borrowings or other indebtedness. There are essentially two types of charge, floating and fixed. A floating charge is appropriate to assets and material which is subject to change on a day to day basis, such as stock. Individual items move into and out of the charge as they are bought and sold in the ordinary course of events. The floating charge crystallises if there is a default or similar event. A floating charge is not as effective as a fixed charge but is more flexible.