Market pegged assets maintain their price parity due to being backed by collateral that has an established real world value. When the value of the collateral falls, the system is designed to react by driving the internal asset exchange to match the new real world exchange rate and trigger margin calls as necessary. However, there exists a possibility that the underlying collateral (BTS) drops in value so quickly the market pegged assets become under-collateralized. Often termed a "black swan event," a sudden crash of BTS value could prevent the system from adjusting in time. In this event, the full amount of collateral is no longer sufficient to purchase the market pegged asset back at the new real exchange rate. In such an event, assets may trade below their face value. It is possible the market could recover if BTS regained value. It is also possible the market would need to be "reset" and asset holders forced to settle for BTS collateral worth less than the intended face value of their assets. Under normal conditions, short term market movements, spreads, and fees charged by exchanges may also affect the potential cost of conversion into and out of market pegged assets.