mtm

(finance) Initialism of mark-to-market. [(finance, accounting, chiefly attributive) Assigning a value to an asset equal to the current market price of the asset or one calculated based on related standardised assets for which there is a market.]

(cognitive science) Initialism of medium-term memory.

(sociolinguistics, language planning) Acronym of mother tongue medium, a medium in which the native language of the population is used, such as in education or in writing.