Mark-to-Market (MTM) profit and loss shows how much profit or loss you realized over the statement period, regardless of whether positions are opened or closed. MTM · MTM stands for Mark-To-Market. Mark-to-market (MTM) is a method of valuing positions and determining profit and loss which is used by IBKR for TWS and statement reporting purposes. Mark to market (MTM) is a method of measuring the fair value of accounts that can fluctuate over time, such as assets and liabilities. One of the important features of Futures contracts is that gains and losses are settled on each trading day. What is MTM in Upstox? Well, it is basically a way to measure a security's current market value.