When you look under your stocks it lists the stocks you have and then the value off to the right of it. I am assuming that value is per share but then in the () it says total? Is this the price for all my shares or each individual share?
The value shown in your inventory is the value based on the faction's value (i.e. credits, facilities, ships etc.). The actual market value is not at all related to the faction value but is based solely on supply and demand.