Definition
A measure of the fair value of accounts that can change over time, such as assets and liabilities, aiming to provide a realistic appraisal of an institution's current financial situation.
In Panel Profits
Daily or real-time revaluation of user portfolio holdings against the latest confirmed secondary market transaction observations.
Comic-market example
A collector's 50-book portfolio re-evaluates nightly as new CGC 9.8 GPA auction results post, adjusting total book equity while keeping original acquisition cost basis immutable.
Calculation
Portfolio MTM Value = ∑ (Holding Quantity_i × Verified Current FMV_i) for all priced holdings
Common mistakes
Never force an unpriced raw book to adopt a slabbed 9.8 price during MTM runs.