Unlisted securities - Shares (usually in small companies) which are not listed on a Recognised Investment Exchange. A limited number of unlisted securities have traded since 1980 on the unlisted securities market (USM) which however closed at the end of 1996. The USM was replaced by the alternative investment market (AIM).
Unlisted securities : shares (usually in small companies) which are not listed on a recognised investment exchange. a limited number of unlisted securities have traded since 1980 on the unlisted securities market (usm) which however closed at the end of 1996. the usm was replaced by the alternative investment market (aim).