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You can book an impairment based on:
Amount. You can impair holdings cost based on an adjustment amount related to a change in the fair market value of the security.
Price. You can impair holdings cost based on changes in the market price.
FX Rate. You can impair holdings cost due to changes in foreign exchange rates.
Price and FX Rate. You can impair holdings cost due to changes in both the market price and/or the foreign exchange rates.
Impairments apply to entities in some industries but not to others. For example, they can apply to insurance and other institutional clients that are not required to carry their investments at fair value. They do not apply to entities in certain specified industries such as brokers and dealers, investment companies, and defined benefit pension plans. Those entities account for substantially all investments in debt and equity securities at fair value. Because those entities are already holding their securities at market value, they have no need to make an impairment adjustment.
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