Market value reveals the price of it.
In "today's market", the value was zero! -- by the standards of Sarbanes-Oxley.
By "tomorrow's market" the value may be ten, twenty, thirty cents on the dollar. But Sarbanes-Oxley doesn't allow that evaluation.
Consequently, with many of their assets turned to short-term trash, and now in violation of their loan covenants, the firms had no choice but to go belly-up.