The market value is calculated by multiplying the amount of securities issued by the market price of all security classes.
If your market value is $0.00 the most common scenario is because you have not entered a current market price for your security classes.
It is good practice to keep your market price up to date so your investors can keep track of the current value of their investments.
To ensure the market price of each of your security classes is up to date, follow the steps described in this article