Ginnie Mae’s REMIC Trust number, 2016-109, contains a total of 43 Trust Asset Groups (or Subgroups) for its “Ginnie Mae I” Trust Asset Type. The valid Subgroups within Security Group 10 range from 10A through 10QQ. These subgroups are for the description of the “IO” and therefore are informational and do not have CUSIPs.
Note that because of the large number of subgroups, the subgroup identifiers require 4 positions: e.g. 10AA, 10BB, etc. Subgroups customarily have been 3 positions but for this REMIC deal subgroups have been expanded to 4 positions. Users to should examine their systems to ensure processing of 4 position subgroups, as applicable.
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