To add the base rate fixing:
Go to Administration > Reference data > Rate fixings.
On the Rate fixings page, click the Add new rate button.
Fill in the Add new rate fixing details > Submit.
A confirmation window pops up; click the Confirm button.
The rate update can trigger the mass update of the existing contracts.
Once you , you can add the rate base fixings. This feature allows you to add the fixing date and a new base rate value for the base rates.