A
mortgage-backed security guaranteed by the Government National Mortgage Association (Ginnie Mae). It is backed exclusively by
mortgages on mobile homes and trailers. Because these homes are less expensive than permanent homes and consequently have shorter mortgage payback periods, the
maturity of a mobile home certificate is almost always shorter than other mortgage-backed securities. They derive their interest payments from the timely payment of
interest and
principal on the mortgages that back them.