A question of values …
Derivative contracts are valued on a mark-to-market ("MtM") basis. This requires valuation of the contracts based on the current market price.
OTC derivatives trade privately. Market prices for specific transactions are not directly available. This means current valuations rely on pricing models.
In current accounting argot, most derivatives are Level 2 assets (Mark-to-Model). In practice, this means that they cannot be priced based on quoted trade prices (Level 1) but are valued using observable inputs; for example, comparable assets or instruments or using interest rates, volatility, correlation, credit spreads etc that can be put through an accepted model to establish values.
