"Illiquid assets" refers to possessions or investments that are difficult to convert into cash quickly without a loss in value. These assets typically cannot be easily sold or traded on short notice. Full definition
But isn't there some controversy about the Yale's endowment fund being invested mainly in illiquid assets for which a day to day price might be difficult to find. (canadiancapitalist.com)
Financial institutions regularly have to estimate values for variety of illiquid assets in a similar way. (alephblog.com)
For example, when making large payments for illiquid assets such as real estate the use of traditional escrow services are preferred. (coinbureau.com)