By default, the Yield Curve opens with your default market data source setting. This is set via the Settings window > Default Settings tab > General tab > Market Data Source dropdown list.
In the Yield Curve you can always see which rates you are using, even if you only have one market data source. You see this via the Market Data Source dropdown list.
In addition, if you have access to multiple market data sources rates and you have permission to toggle between those sources, you can also manually change the market data source currently used for the page for the current session using the Market Data Source dropdown list.
In the Yield Curve, if you choose to use your own rate feed and any data needed for this page is missing from your rate feed the following rules apply:
Within a currency, if you provide rates for some of the tenors within a category and omit rates for one or more of the tenors, SD calculates the missing tenors based on the tenors for which you did provide a rate.
Within a currency, if you do not provide rates for one of the supported categories, these values will be saved as empty in the database. When you choose to use your yield curve, SD uses its own market rates for the missing category. For example, if for the USD currency you provide rates for the cash rates and futures rates only, SD calculates the USD yield curve using your cash rates and futures rates and SD rates for the swap rates.
If you do not provide any rates for a currency, SD uses its own market rates for all tenors in all three categories.
To change the market data source in the Yield Curve:
In the Yield Curve in the Market Data Source dropdown list select a different source. The page is updated using the data from the selected source.