This is similar to the Excel plugin from Misys. It sits as a data source in the Tibco Spotfire server. Using the FusionRisk Excelsior interface, it pulls PnL and VaR values from the FusionRisk CSM into Spotfire.
FusionRisk values can be accessed using the Spotfire on-demand feature. In this way the user can drilldown from VaR reports to individual PnL values and display the information graphically