This excerpt taken from the YBTVA 10-K filed Apr 22, 2009.
Other intangible assets comprise a significant portion of our total assets. We must test our intangible assets for impairment at least annually, which may result in a material, non-cash impairment charge could have a material adverse impact on our results of operations and shareholders' equity.
Indefinite-lived intangibles are subject to impairment assessments at least annually (or more frequently when events or circumstances indicate that an impairment may have occurred) by applying a fair-value based test. Our principal intangible assets are our programming license rights, broadcast licenses and network affiliations. The risk of impairment losses may increase to the extent that our market capitalization and earnings decline. Impairment losses may result in a material, non-cash impairment charge. Furthermore, impairment losses could have an adverse impact on our results of operations and shareholders' equity.