The debt or receivables acquired by the Special Purpose Vehicle (SPV) from the originator and issued by the SPV can be classified as either asset-backed securities or mortgage-backed securities, depending on the nature of the underlying assets. Asset-backed securities are backed by a pool of assets such as loans, leases, or receivables, while mortgage-backed securities are backed by a pool of mortgage loans. Both types of securities represent ownership interests in the underlying assets and are issued by the SPV to investors.