Liquidology is the science of Liquidity assembled from different fields of knowledge and from dozens of scientists and contributors by Marc René Deschenaux.
This term is not only polysemic but also ambiguous due to its popular acception meaning cash. In finance, it is used for a physical or moral person and for a market.
The financial liquidity ratio determines capacity of a person to be a counterpart to a buy or sell transaction initiated by a trader.
Market liquidity ratio determines capacity of said market to be a counterpart to a buy or sell transaction initiated by a trader. It also refers to the efficiency or ease with which a securities market can execute a transaction.