A mortgage is a method of using property as security for the payment of a debt. The term mortgage refers to the legal device used in securing the property, but mortgage is also commonly used to refer to the debt secured by the mortgage. In many countries it is normal for home purchase to be funded by a mortgage. In countries where the demand for home ownership is highest, strong domestic markets have developed, notably in the United States. Refinancing refers to applying for a secured loan intended to replace an existing loan secured by the same assets. The most common consumer refinancing is for a home mortgage. Refinancing may be undertaken to reduce interest costs (by refinancing at a lower rate), to pay off other debts, to reduce one's periodic payment obligations (sometimes by taking a longer-term loan), to reduce risk (such as by refinancing from a variable-rate to a fixed-rate loan), and/or to liquidate some or all of the equity that has accumulated in real property during the tenure of ownership.