What is fair value
It is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.
What is the most advantageous market
it is the one in which the reporting entity could sell the asset at a price that maximizes the amt. that would be received for the asset or that minimizes the amount that would be paid to transfer the liability.
what is the principal market
the market available to the entity with greatest volume & level of activity for the item.