C.D.s that are issued with the tacit understanding that the buyer will not trade the certificate. Quite often, the issuing bank will insist that the certificate be safekept by it to ensure that the understanding is honored by the buyer.
LOCK-UP C.D.S
Meaning of LOCK-UP C.D.S in English
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012