Key Delta of function
Price in Tradable configures the input so that any risk relating to variables other than interest rate or volatility is reported.
The price of the caller tradable generally depends on one or more
Quotable or Valuation objects.
The entry here relates only to those objects that relate to types that are neither interest rates nor vols.
When checked, the current array held by the key
Risk Ref is extended with the above objects.
Also, the current array held by of the key
Risk Models is extended with corresponding default models.