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You use this method to read interest rate volatilities. The method checks whether a data record already exists for the key entered. If a record does not already exist, an error message is generated in the return parameter. The key contains the parameters MDCODE, VOLTYPE, and REFRATE. If the volatility is an implied volatility, the option, which was calculated using the implied volatility, can be specified as well (parameters EXTNOOPTION, EXTPRODTYPEOPTION).
Possible input values are either stored as fixed values in the system, or are checked again the appropriate Customizing settings. Exception: For parameter EXTNOOPTION, the function module checks whether the input value identifies a financial instrument or a financial transaction.