Mortgage-backed securities (M.B.S. ) on which registered holders receive separate principal and interest payments on each of their certificates, usually directly from the servicer of the M.B.S. pool. GNMA-I mortgage-backed securities are single- issuer pools.
GNMA-I
Meaning of GNMA-I in English
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012