Financial Reporting Quality: Is Fair Value a Plus or a Minus?

Recent deliberations by both the International Accounting Standards Board (IASB) and the Financial Accounting Standard Board (FASB) in the United States have focused on how fair values of assets and liabilities should be measured. The issue of when, rather than how, fair value measurement should be applied is still far from resolved, however. Fair values have been mandated for some assets and liabilities under both IASB and FASB standards, but it is fair to say that principles governing the applicability of fair values have yet to be articulated: when is fair value accounting appropriate and when is it not? Or, in terms of my charge for this paper, under what circumstances is fair value a plus or a minus?